大家帮我看看这个数学题，是什么？
\u8bf7\u5e2e\u6211\u770b\u770b\u8fd9\u4e9b\u6570\u5b66\u98981.\u90ae\u9012\u5458A\u548cB\u76f8\u8ddd59\u5343\u7c73\uff0c\u76f8\u5411\u800c\u884c\uff0cA 2\u4e2a\u5c0f\u65f6\u8d70\u4e867\u5343\u7c73\uff0cB 3\u4e2a\u5c0f\u65f6\u8d70\u4e868\u5343\u7c73\uff0c\u800cB\u6bd4A\u665a\u51fa\u53d11\u5c0f\u65f6\uff0c\u6c42A\u5728\u9047\u5230B\u4e4b\u524d\u8d70\u4e86\u591a\u5c11\u5343\u7c73\uff1f
\u89e3\uff1a\u8bbeA\u5728\u9047\u5230B\u4e4b\u524d\u8d70\u4e86x \u5343\u7c73
x/(7/2)-1=(59-x)/(8/3)
\u89e3\u65b9\u7a0b\u5f97x=35 \u3002
\u5373A\u5728\u9047\u5230B\u4e4b\u524d\u8d70\u4e8635\u5343\u7c73.
2.\u7532\u3001\u4e59\u4e24\u4eba\u4ece\u76f8\u8ddd10\u5343\u7c73\u7684\u4e24\u5730\u540c\u65f6\u76f8\u5bf9\u800c\u884c\uff0c\u7532\u901f\u5ea66\u5343\u7c73/\u5c0f\u65f6\uff0c\u4e59\u901f\u5ea64\u5343\u7c73/\u5c0f\u65f6\uff0c\u7532\u5e26\u4e86\u4e00\u53ea\u5c0f\u72d7\uff0c\u72d7\u7684\u901f\u5ea610\u5343\u7c73/\u5c0f\u65f6\uff0c\u56e0\u4e3a\u72d7\u6bd4\u7532\u8dd1\u5f97\u5feb\uff0c\u72d7\u6700\u5148\u9047\u5230\u4e59\uff0c\u9047\u5230\u4e59\u540e\u53c8\u56de\u6765\u627e\u7532\uff0c\u9047\u5230\u7532\u540e\u53c8\u53bb\u627e\u4e59\uff0c\u5c0f\u72d7\u8fd9\u6837\u5728\u7532\u3001\u4e59\u4e4b\u95f4\u5954\u8dd1\uff0c\u95ee\u7532\u3001\u4e59\u76f8\u9047\u65f6\u5c0f\u72d7\u4e00\u5171\u8dd1\u4e86\u591a\u5c11\u5343\u7c73\uff1f
\u89e3\uff1a\u7532\u3001\u4e59\u76f8\u9047\u4e4b\u524d\u5c0f\u72d7\u4e00\u76f4\u5728\u8dd1\uff0c\u6240\u4ee5\u4e24\u4eba\u76f8\u9047\u7528\u4e86\u591a\u957f\u65f6\u95f4\uff0c\u5c0f\u72d7\u5c31\u8dd1\u4e86\u591a\u957f\u65f6\u95f4\u3002
\u4e24\u4eba\u76f8\u9047\u7528\u65f6 10/\uff086+4\uff09=1\u5c0f\u65f6\uff0c
\u6240\u4ee5\u5c0f\u72d7\u8dd1\u4e861\u5c0f\u65f6\uff0c
\u5373\u7532\u3001\u4e59\u76f8\u9047\u65f6\u5c0f\u72d7\u4e00\u5171\u8dd1\u4e86 10*1=10 \u5343\u7c73\u3002
3.\u73b0\u5728\u662f4\u70b95\u5206\uff0c\u518d\u8fc7\u591a\u5c11\u5206\u949f\uff0c\u5206\u9488\u548c\u65f6\u9488\u7b2c\u4e00\u6b21\u91cd\u5408\uff1f
\u89e3\uff1a\u8bbe\u6307\u5411\u6570\u5b5712\u65f6\u4e3a0\u5ea6\uff0c\u90a3\u4e484\u70b95\u5206\uff0c\u5206\u9488\u6307\u5411\u7684\u89d2\u5ea6\u4e3a30\u5ea6\uff0c
\u65f6\u9488\u6307\u5411\u4e3a120\u5ea6\u52a0\u4e0a30\u5ea6\u76841/12\uff08\u8868\u4e0a\u4e24\u6570\u5b57\u95f4\u5939\u89d2\u4e3a30\u5ea6\uff0c5\u5206\u949f\u4e3a1\u5c0f\u65f6\u76841/12\uff09\u3002\u6545\u65f6\u9488\u6307\u5411\u89d2\u5ea6\u4e3a122.5\u5ea6\u3002\u5206\u9488\u3001\u65f6\u9488\u76f8\u5dee92.5\u5ea6\u3002
\u4e00\u5206\u949f\u5206\u9488\u8f6c\u8fc7\u89d2\u5ea6\u4e3a6\u5ea6\uff0c\u65f6\u9488\u8f6c\u8fc7\u89d2\u5ea6\u4e3a30\u5ea6\u76841/60\uff0c\u53730.5\u5ea6\uff1b
\u6545 \u518d\u7ecf\u8fc7 92.5/\uff086-0.5\uff09=17\u5206\u949f\uff0c\u5206\u9488\u548c\u65f6\u9488\u7b2c\u4e00\u6b21\u91cd\u5408\u3002
4.\u5341\u65f6\u4e0e\u5341\u4e00\u65f6\u4e4b\u95f4\u4e24\u9488\u5728\u4ec0\u4e48\u65f6\u523b\u6210\u4e00\u6761\u76f4\u7ebf\uff1f
\u89e3\uff1a\u539f\u56e0\u4e0e\u4e0a\u9898\u4e00\u6837\u3002\uff08\u5206\u9488\u6bcf\u5206\u949f\u8f6c6\u5ea6\uff0c\u65f6\u9488\u6bcf\u5206\u949f\u8f6c0.5\u5ea6\uff09
\u5047\u8bbe\u4ece10\u70b9\u5f00\u59cb\u8ba1\u65f6\uff0c\u65f6\u9488\u3001\u5206\u9488\u5939\u89d260\u5ea6\uff0c\u5f53\u65f6\u9488\u3001\u5206\u9488\u5728\u4e00\u76f4\u7ebf\u4e0a\u65f6\uff0c\u4e24\u8005\u5939\u89d2\u4e3a180\u5ea6\uff0c\u6216\u4e24\u8005\u91cd\u5408\u3002
\uff081\uff09\u4e24\u9488\u5939\u89d2\u4e3a180\u5ea6
\u7ecf\u8fc7 \uff08180-60\uff09/\uff086-0.5\uff09=240/11=21.8 \u5206\u949f\u4e24\u9488\u6210180\u5ea6\uff0c\u5728\u4e00\u76f4\u7ebf\u4e0a\u3002\uff08\u537310\u70b921\u591a\uff09
\uff082\uff09\u4e24\u9488\u91cd\u5408
\u7ecf\u8fc7 \uff08360-60\uff09/\uff086-0.5\uff09=600/11=54.5\u5206\u949f\u4e24\u9488\u91cd\u5408\uff0c\u4e5f\u662f\u5728\u4e00\u76f4\u7ebf\u4e0a\u3002\uff08\u537310\u70b954\u591a\uff09
5.\u67d0\u5b66\u751f\u5728360\u7c73\u957f\u7684\u73af\u5f62\u8dd1\u9053\u4e0a\u8dd1\u4e86\u4e00\u5708\uff0c\u5df2\u77e5\u4ed6\u5728\u524d\u4e00\u534a\u7684\u901f\u5ea6\u662f5\u7c73/\u79d2\uff0c\u540e\u4e00\u534a\u65f6\u95f4\u7684\u901f\u5ea6\u662f4\u7c73/\u79d2\uff0c\u6c42\u4ed6\u8dd1\u4e00\u534a\u8def\u7a0b\u6240\u9700\u65f6\u95f4\u3002
\u89e3\uff1a\u603b\u65f6\u95f4\u8bbe\u4e3at\uff0c
\u5219\u6709 5*t/2+4*t/2=360,
\u89e3\u5f97 t=80
\u524d\u4e00\u534a\u65f6\u95f4\u6240\u8dd1\u8def\u7a0b\u4e3a5*\uff0880/2)=200\u7c73\uff0c\u5df2\u7ecf\u8d85\u8fc7\u4e00\u534a\u8def\u7a0b\uff0c
\u6240\u4ee5 \u6b64\u4eba\u8dd1\u5b8c\u524d\u534a\u7a0b\u7684\u901f\u5ea6\u4e3a5\u7c73/\u79d2\uff0c
\u6240\u7528\u65f6\u95f4\u4e3a 180/5=36\u79d2\u3002
6.\u5c0f\u660e\u5230\u6d77\u8fb9\u6563\u6b65\uff0c\u4e00\u6761\u8239\u8fce\u9762\u9a76\u6765\uff0c\u4ece\u4ed6\u8eab\u8fb9\u5f00\u8fc7\u7528\u4e863\u79d2\uff0c\u8fc7\u4e00\u4f1a\u513f\u8be5\u8239\u53c8\u4ece\u540e\u9762\u8ffd\u4e0a\u5c0f\u660e\uff0c\u4ece\u4ed6\u8eab\u8fb9\u5f00\u8fc7\u7528\u4e86 \u56db\u53c8\u4e8c\u5206\u4e4b\u4e00 \u79d2\uff0c\u5c0f\u660e\u6b65\u884c\u7684\u901f\u5ea63.64\u5343\u7c73/\u5c0f\u65f6\uff0c\u6c42\u8fd9\u6761\u8239\u957f\u3002
\u89e3\uff1a\uff08\u4f30\u8ba1\u9898\u76ee\u9519\u4e86\uff0c\u5c0f\u660e\u901f\u5ea6\u53ef\u80fd\u4e3a3.6\u5343\u7c73/\u5c0f\u65f6\uff0c\u597d\u7b97\uff09
\u5c0f\u660e\u901f\u5ea6\u4e3a1\u7c73/\u79d2\uff08=3.6\u5343\u7c73/\u5c0f\u65f6\uff09
\u8bbe\u8239\u957fx\u7c73\uff0c\u8239\u901f\u5ea6\u4e3av\u3002
\u5219\u6709 \uff081+v\uff09*3=x ----1
\uff08v-1\uff09*4.5=x ----2
\u4e24\u5f0f\u8054\u7acb\u5f97\uff081+v\uff09*3=\uff08v-1\uff09*4.5
\u5bb9\u6613\u89e3\u5f97 v=5\uff0c\u4ee3\u51651\u5f0f\u5f97\u8239\u957f x=18\u7c73\u3002
7.\u7532\u3001\u4e59\u4e8c\u4eba\u5728400\u7c73\u7684\u73af\u5f62\u8dd1\u9053\u4e0a\u7ec3\u4e60\u957f\u8dd1\uff0c\u540c\u65f6\u4ece\u540c\u4e00\u5730\u70b9\u51fa\u53d1\uff0c\u7532\u7684\u901f\u5ea6\u662f6\u7c73/\u79d2\uff0c\u4e59\u7684\u901f\u5ea6\u662f4\u7c73/\u79d2\u3002
\uff081\uff09\u4e24\u4eba\u80cc\u5411\u800c\u884c\u591a\u957f\u65f6\u95f4\u540e\u7b2c\u4e00\u6b21\u76f8\u9047\uff1f\u7b2c\u4e8c\u6b21\u76f8\u9047\uff1f\u2026\u2026\u7b2cn\u6b21\u76f8\u9047\uff1f
\uff082\uff09\u4e24\u4eba\u82e5\u540c\u5411\u800c\u884c\uff0c\u4e59\u8dd1\u51e0\u5708\u540e\uff0c\u7532\u53ef\u8d85\u8fc7\u4e591\u5708\uff1f2\u5708\uff1f\u2026\u2026n\u5708\uff1f
\u89e3\uff1a\uff081\uff09\u7532\u4e59\u901f\u5ea6\u4e4b\u548c\u4e3a10\uff0c\u6545\u7ecf\u8fc7400/10=40\u79d2\u540e\u7b2c\u4e00\u6b21\u76f8\u9047\uff0c80\u79d2\u540e\u7b2c\u4e8c\u6b21\u76f8\u9047\uff0c40n\u79d2\u540e\u7b2cn\u6b21\u76f8\u9047\u3002
\uff082\uff09\u7532\u4e59\u901f\u5ea6\u4e4b\u5dee\u4e3a2\uff0c\u6545\u7ecf\u8fc7400/2=200\u79d2\u540e\u7532\u8d85\u8fc7\u4e591\u5708\uff0c400\u79d2\u540e\u7532\u8d85\u8fc7\u4e592\u5708\uff0c200n\u79d2\u540e\u7532\u8d85\u8fc7\u4e59n\u5708\u3002
8.\u53cc\u884c\u94c1\u8def\u7ebf\u4e0a\uff0c\u7532\u3001\u4e59\u4e24\u7ad9\u76f8\u8ddd450\u5343\u7c73\uff0c\u4e00\u5217\u6162\u8f66\u4ece\u7532\u7ad9\u5f00\u51fa\uff0c\u6bcf\u5c0f\u65f6\u884c\u9a7680\u5343\u7c73\uff0c\u4e00\u5217\u5feb\u8f66\u4ece\u4e59\u7ad9\u5f00\u51fa\uff0c\u6bcf\u5c0f\u65f6\u884c\u9a76120\u5343\u7c73\uff0c\u4e24\u8f66\u540c\u65f6\u5f00\u51fa\uff0c\u76f8\u5411\u800c\u884c\uff0c\u591a\u5c11\u5c0f\u65f6\u540e\u76f8\u8ddd150\u5343\u7c73\uff1f
\u89e3\uff1a\uff08450-150\uff09/\uff08120+80\uff09=1.5\uff0c
\u53731.5\u5c0f\u65f6\u540e\u76f8\u8ddd150\u5343\u7c73\u3002
9.\u4e00\u5217\u706b\u8f66\u8eab\u957f250\u7c73\uff0c\u4ee590\u5343\u7c73/\u65f6\u7684\u901f\u5ea6\u901a\u8fc7\u4e00\u5ea7\u5927\u6865\uff0c\u82e5\u6865\u957f500\u7c73\uff0c\u95ee\uff1a
\uff081\uff09\u706b\u8f66\u8981\u7ecf\u8fc7\u591a\u5c11\u65f6\u95f4\u624d\u80fd\u901a\u8fc7\u5927\u6865\uff1f
\uff082\uff09\u706b\u8f66\u5728\u5927\u6865\u4e0a\u884c\u9a76\u7684\u65f6\u95f4\u662f\u591a\u957f\uff1f
\u89e3\uff1a\uff081\uff0990\u5343\u7c73/\u65f6=25\u7c73/\u79d2\uff0c
\uff08500+250\uff09/25=30\uff0c
\u5373\u706b\u8f66\u8981\u7ecf\u8fc730\u79d2\u624d\u80fd\u901a\u8fc7\u5927\u6865\u3002
\uff082\uff09\uff08500-250\uff09/25=10\uff0c
\u5373\u706b\u8f66\u5728\u5927\u6865\u4e0a\u884c\u9a76\u7684\u65f6\u95f4\u662f10\u79d2\u3002
10.\u7c97\u8721\u70db\u548c\u7ec6\u8721\u70db\u7684\u957f\u77ed\u4e00\u6837\uff0c\u7c97\u8721\u70db\u53ef\u70b95\u5c0f\u65f6\uff0c\u7ec6\u8721\u70db\u53ef\u70b94\u5c0f\u65f6\uff0c\u540c\u65f6\u70b9\u71c3\u8fd9\u4e24\u53ea\u8721\u70db\uff0c\u7ecf\u8fc7\u591a\u957f\u65f6\u95f4\u7c97\u8721\u70db\u957f\u662f\u7ec6\u8721\u70db\u957f\u76844\u500d\uff1f
\u89e3\uff1a\u8bbe\u8721\u70db\u957f\u4e3ax\u3002\u5219\u7c97\u8721\u70db\u71c3\u70e7\u901f\u5ea6\u4e3ax/5\uff0c\u7ec6\u8721\u70db\u71c3\u70e7\u901f\u5ea6\u4e3ax/4.
\u8bbe\u7ecf\u8fc7\u65f6\u95f4t\u540e\u7c97\u8721\u70db\u957f\u662f\u7ec6\u8721\u70db\u957f\u76844\u500d\u3002
\u6709 ( x-tx/5)/( x-tx/4)=4
\u89e3\u5f97 x=15/4.
\u5373\u7ecf\u8fc715/4\u5c0f\u65f6\u540e\u7c97\u8721\u70db\u957f\u662f\u7ec6\u8721\u70db\u957f\u76844\u500d\u3002
11.\u8001\u5e08\u4e70\u6765\u4e00\u6279\u4e66\u5206\u7ed96\u4e2a\u73ed\uff0c\u5148\u7ed9\uff081\uff09\u73ed1\u672c\uff0c\u518d\u628a\u5269\u4e0b\u7684 \u4e03\u5206\u4e4b\u4e00 \u5206\u7ed9\u8fd9\u4e2a\u73ed\uff1b\u7ed9\uff082\uff09\u73ed2\u672c\uff0c\u518d\u628a\u5269\u4e0b\u7684 \u4e03\u5206\u4e4b\u4e00 \u5206\u7ed9\u8fd9\u4e2a\u73ed\uff1b\u7ed9\uff083\uff09\u73ed3\u672c\uff0c\u518d\u628a\u5269\u4e0b\u7684 \u4e03\u5206\u4e4b\u4e00 \u5206\u7ed9\u8fd9\u4e2a\u73ed\uff1b\u7136\u540e\u628a\u5269\u4e0b\u7684\u4e66\u5e73\u5747\u5206\u62103\u4efd\uff0c\u5206\u7ed9\uff084\uff09\u3001\uff085\uff09\u3001\uff086\uff09\u73ed\uff0c\u7ed3\u679c\u8fd9\u516d\u4e2a\u73ed\u5206\u5f97\u7684\u4e66\u4e00\u6837\u591a\uff0c\u95ee\u8001\u5e08\u4e70\u6765\u591a\u5c11\u672c\u4e66\uff0c\u6bcf\u4e2a\u73ed\u5206\u51e0\u672c\uff1f
\u89e3\uff1a\u8bbe\u8001\u5e08\u4e70\u6765x\u672c\u4e66\u3002
\u5219\u67091+\uff08x-1\uff09/7=x/6
\u89e3\u5f97 x=36
\u663e\u7136\u8001\u5e08\u4e70\u676536\u672c\u4e66\uff0c\u6bcf\u4e2a\u73ed\u52066\u672c.
12.\u519c\u573a\u6cbb\u7406\u6c99\u6f20\uff0c\u7b2c\u4e00\u5e74\u6cbb\u7406\u4e86\u6c99\u6f20\u9762\u79ef\u7684 \u4e09\u5206\u4e4b\u4e00 \u8fd8\u591a2\u516c\u9877\uff0c\u7b2c\u4e8c\u5e74\u6cbb\u7406\u4e86\u5269\u4e0b\u7684 \u4e8c\u5206\u4e4b\u4e00 \u5c111\u516c\u9877\uff0c\u8fd9\u65f6\u8fd8\u5269\u4e0b38\u516c\u9877\u6ca1\u6709\u6cbb\u7406\uff0c\u95ee\u8fd9\u7247\u6c99\u6f20\u5171\u6709\u591a\u5c11\u516c\u9877\u3002
\u89e3\uff1a\u8bbe\u8fd9\u7247\u6c99\u6f20\u5171\u6709x\u516c\u9877\u3002
\u5219\u6709 x/3 +2+[x-(x/3 +2)]/2-1+38=x,
\u89e3\u5f97 x=120.
\u5373\u8fd9\u7247\u6c99\u6f20\u5171\u6709120\u516c\u9877\u3002
13.\u4e00\u4f4d\u8001\u4eba\u517b\u4e8617\u53ea\u7f8a\uff0c\u6309\u6bd4\u4f8b\u5206\u7ed93\u4e2a\u513f\u5b50\uff0c\u5927\u513f\u5b50\u5206 \u4e8c\u5206\u4e4b\u4e00\uff0c\u4e8c\u513f\u5b50\u5206 \u4e09\u5206\u4e4b\u4e00\uff0c\u4e09\u513f\u5b50\u5206 \u4e5d\u5206\u4e4b\u4e00\u3002\u5728\u5206\u7f8a\u65f6\u4e0d\u8bb8\u5bb0\u6740\u7f8a\u53ea\uff0c\u95ee\u600e\u6837\u5206\uff1f\u6bcf\u4e2a\u513f\u5b50\u5206\u51e0\u53ea\uff1f
\u89e3\uff1a\u501f\u67651\u53ea\u7f8a\uff0c\u517118\u53ea\u7f8a\u3002
\u5927\u513f\u5b50\u5206\u5f9718/2=9\u53ea\u7f8a\uff0c
\u4e8c\u513f\u5b50\u5206\u5f9718/3=6\u53ea\u7f8a\uff0c
\u4e09\u513f\u5b50\u5206\u5f9718/9=2\u53ea\u7f8a\u3002
9+6+2\u6070\u597d\u7b49\u4e8e17\uff0c\u5c06\u501f\u6765\u76841\u53ea\u7f8a\u5f52\u8fd8\u5373\u53ef\u3002
14.\u67d0\u73ed\u5b66\u751f\u53bb\u91ce\u708a\uff0c\u5171\u5e26\u4e8665\u53ea\u7897\uff0c\u5403\u996d\u65f6\u6bcf2\u4eba\u5408\u7528\u4e00\u53ea\u996d\u7897\uff0c\u6bcf3\u4eba\u5408\u7528\u4e00\u53ea\u6c64\u7897\uff0c\u6bcf4\u4eba\u5408\u7528\u4e00\u53ea\u83dc\u7897\uff0c\u6c42\u8fd9\u4e2a\u73ed\u5171\u6709\u591a\u5c11\u5b66\u751f\u3002
\u89e3\uff1a\u8bbe\u8fd9\u4e2a\u73ed\u5171\u6709x\u540d\u5b66\u751f\uff0c
\u5219\u6709 x/2+x/3+x/4=65
\u89e3\u5f97x=60
\u5373\u8fd9\u4e2a\u73ed\u5171\u670960\u540d\u5b66\u751f\u3002
15.\u4e00\u4ef6\u5de5\u4f5c\u5b8c\u6210\u7531\u7532\u5355\u72ec\u505a\u970024\u5c0f\u65f6\uff0c\u7531\u4e59\u5355\u72ec\u505a\u970018\u5c0f\u65f6\u3002\u73b0\u5728\u5148\u7531\u7532\u5355\u72ec\u505a6\u4e2a\u5c0f\u65f6\uff0c\u5269\u4e0b\u7684\u90e8\u5206\u7531\u7532\u3001\u4e59\u5408\u505a\uff0c\u5b8c\u6210\u8fd9\u4ef6\u5de5\u4f5c\u9700\u8981\u51e0\u5c0f\u65f6\uff1f
\u89e3\uff1a\u7532\u901f\u5ea6\u4e3a1/24,\u4e59\u901f\u5ea6\u4e3a1/18.
\u9700\uff081-6/24\uff09/(1/24+1/18)=54/7 \u5c0f\u65f6\u5b8c\u6210\u5269\u4e0b\u7684\u90e8\u5206\u3002
\u6574\u4e2a\u5de5\u4f5c\u7528\u65f66+54/7=96/7 \u5c0f\u65f6\u3002
\u672c\u4eba\u82b1\u4e86\u5c06\u8fd11\u4e2a\u5c0f\u65f6\u624d\u641e\u5b9a\uff0c\u5e0c\u671b\u91c7\u7eb3\uff01
(2xy-y)-(-y+yx)
=2xy-y+y-yx
=xy
5(a\u5e73\u65b9b-3ab\u5e73\u65b9)-2(a\u5e73\u65b9b-7ab\u5e73\u65b9)
=5a^2b-15ab^2-2a^2b+14ab^2
=3a^2b-ab^2
(4a+3a\u5e73\u65b9-3+3a\u7acb\u65b9)-(-a+4a\u7acb\u65b9)
=4a+3a^2-3+3a^3+a-4a^3
=-a^3+3a^2+5a-3
a=-2\u6240\u4ee5\u539f\u5f0f=(-2)^3+3*(-2)^2+5*(-2)-3
=-8+12-10-3
=-9
2x\u5e73\u65b9y-2xy\u5e73\u65b9-\u3014(-3x\u5e73\u65b9y\u5e73\u65b9+3x\u5e73\u65b9y)+(3x\u5e73\u65b9y\u5e73\u65b9-3xy\u5e73\u65b9)\u3015
=2x^2y-2xy^2-(-3x^2y^2+3x^y+3x^2y^2-3xy^2)
=2x^2y-2xy^2-(3x^2y-3xy^2)
=2x^2y-2xy^2-3x^2y+3xy^2
=-x^2y+xy^2
=xy(y-x)
x=-1,y=2\u6240\u4ee5\u539f\u5f0f=(-1)*2*[2-(-1)]
=-6
对于这些题，你不要认为这些题就没错，出这个题的老师也是人，甚至没你强，比你差的人也可以出题，知道吗？敢于怀疑，只要你自己基础扎实，每个知识点你都了然于心，就不怕这些题了。
绛旓細濡傚浘銆備笉婊℃剰鍙互鍗曠嫭鎷
绛旓細1銆7+8灏炬暟鏄5锛屽渾鏄7锛屼笁瑙掑姞2=7锛屼笁瑙掓槸5銆2銆6+5灏炬暟鏄1锛屼笁瑙掓槸5锛5+3=8锛屾柟妗嗘槸3-1=2銆3銆14+6=8锛屾柟妗嗘槸6锛8-2=6锛屽渾鏄8+1=9銆
绛旓細鍒嗘瀽锛氭牴鎹綋绉叕寮忥紝鍒嗗埆鐢ㄥ瓧姣嶅皢鍚勪綋绉叕寮忚〃绀哄嚭鏉ワ紝浠庤屾弧瓒冲叾鍜屼负130绔嬫柟鍘樼背锛岃繘鑰屾眰鍑衡淪h 鈥濈殑鍊硷紟瑙ｏ細璁惧渾鏌辩殑楂樻槸h 鍘樼背锛屽簳闈㈢Н鏄 S骞虫柟鍘樼背锛屽垯鍦嗛敟鐨勯珮鏄2h 鍘樼背锛屽簳闈㈢Н涓2/3s 骞虫柟鍘樼背锛岄偅涔堝渾鏌辩殑浣撶Н鏄疭h 绔嬫柟鍘樼背锛嶴h 锛 1/3 脳 2/3S 脳 2h 锛130 Sh 锛 4/9 ...
绛旓細鍙互涓嶇敤鎹㈠厓.xdx=-d(1-x^2)/2,鍚庨潰寰堢畝鍗曠殑銆傜粨鏋滀负1.
绛旓細瑙ｇ瓟濡備笅锛氬崈浣嶆暟涓婂簲璇ユ槸锛2锛堝洜涓哄彧鏈2鏃㈡槸璐ㄦ暟锛屽張鏄伓鏁帮級鐧句綅涓婂簲璇ユ槸锛14/2锛7 鎵浠杩欎釜鏁板瓧搴旇鏄27XX,鍙堝洜涓鸿繖涓暟鑳借45鏁撮櫎锛岃45鐨勬渶灏忓洜鏁版槸5鍜9锛屽洜姝よ繖涓洓浣嶆暟鏃㈣兘琚5鏁撮櫎鍙堣兘琚9鏁撮櫎锛屾墍浠ヤ釜浣嶆暟瀛楀彧鑳芥槸0鎴5銆傚悓鏃跺洜涓鸿繖涓暟鏄ぇ浜庣瓑浜2700锛屽皬浜2800鐨勶紝鑰2700/45=60,2800/45...
绛旓細璋佹潵甯垜瑙ｇ瓟杩欓亾鏁板棰橈紝璋㈣阿鍟 璇存槑灏忓紶鑺变簡220+80=300鍏 300/锛220+180锛=0.75 鏁呯浉褰撲簬涓冧簲鎶 甯屾湜甯埌浣犅 鏈涢噰绾硚璇澶у甯繖鐪嬬湅杩閬撴暟瀛﹂鎬庝箞鍋氾紝璋㈣阿鍟*^_^* 3+4+5+6+7+8+9=42 42闄や互3绛変簬14 涔熷氨鏄宸﹁竟琚櫎鏁颁腑鐨勫洓涓暟鍔犺捣鏉ュ簲璇ョ瓑浜14*2=28锛岄櫎鏁颁腑鐨...
绛旓細濂崇敓50-35=15浜 2.27脳6锛162銆杩欐槸鍘熸湁鑽夐噺锛6澶╃殑鐢熼暱閲 23脳9锛207銆杩欐槸鍘熸湁鑽夐噺锛9澶╃殑鐢熼暱閲 锛207锛162锛壝凤紙9锛6锛夛紳15銆杩欐槸鑽夋瘡澶╃殑鐢熼暱閲锛岃繖涓鏁伴噺鍙緵15澶村悆涓澶╋紝鎵浠ュ彲浠ュ畨鎺15澶翠笓闂ㄥ悆杩欎釜鑽夐噺銆162锛15脳6锛72銆杩欐槸鍘熸湁鑽夐噺 72梅(21-15)锛12澶┿杩鏄棶棰绛旀銆
绛旓細1銆佷簲瑙掓槦=涓や釜涓夎 2涓簲瑙掓槦=4涓笁瑙 8涓笁瑙=72 1涓笁瑙=9 1涓簲瑙掓槦=9+9=18 2銆佸渾=3涓柟鍧 2涓渾=3+3=6涓柟鍧椕 9涓柟鍧=90 1涓柟鍧=90梅9=10 鍦=10+10+10=30 3銆43+48+55=146=2涓渾+2涓笁瑙+2涓柟鍧 1涓渾+1涓笁瑙+1涓柟鍧=146 梅2=73 73-43=30 锛堝嵆涓夎...
绛旓細鏄嚑骞寸骇鐨勶紵楂樹腑鐨勮瘽鐩存帴鐢ㄧ偣鍒扮洿绾跨殑璺濈鍏紡锛屽垵涓殑璇濈敤鐩镐技涓夎褰傗埖鐩寸嚎鍚戜笂骞崇Щ1涓崟浣嶁埓鐩寸嚎l涓簓=2x+1鍒欏綋x=0鏃讹紝y=1锛涘綋y=0鏃讹紝x=-1/2浠ょ洿绾縧涓巟杞寸殑浜ょ偣鏄疉锛屼笌y杞寸殑浜ょ偣鏄疊鍒橝(-1/2锛0)锛孊(0锛1)鈭碅O=|-1/2 - 0|=1/2锛孊O=|0-1|=1鈭礎O鈯O鈭碅B²=...
绛旓細鎰忔濆氨鏄繖涓変釜鏁板悗闈㈢殑杩炵画浜斾釜鑷劧鏁鏄粈涔 浜屽崄鍏悗闈簲涓暟灏辨槸浜屽崄涓冦佷簩鍗佸叓銆佷簩鍗佷節銆佷笁鍗併佷笁鍗佷竴 浜斿崄鍏悗闈簲涓暟灏辨槸浜斿崄涔濄佸叚鍗併佸叚鍗佷竴銆佸叚鍗佷簩銆佸叚鍗佷笁 涓冨崄涔濆悗杩炰袱涓暟灏辨槸鍏崄銆佸叓鍗佷竴銆佸叓鍗佷簩銆佸叓鍗佷笁銆佸叓鍗佸洓
