初二数学题
\u521d\u4e8c\u6570\u5b66\u9898\u770b\u4e09\u89d2\u5f62AMD\u4e0eBMC\u5168\u7b49
\u4e0a\u5e95\u4e0e\u4e0b\u5e95\u5e73\u884c\u53ef\u8bc12\u89d2\u4e0a\u7b49 \u5728\u52a0\u4e0a\u5bf9\u89d2\u76f8\u7b49
\u6240\u4ee5\u5168\u7b49
AMD\u7684\u9762\u79ef\u662f500/10=50 \u9ad8\u662f50/10*2=10
AMD\u7684\u9ad8/\u4e0a\u5e95=BMC\u7684\u9ad8/\u4e0b\u5e95
BMC\u9ad8\u4f4d20
20*20/2=200
\u8981\u82b12000 \u6240\u4ee5\u4e0d\u591f
1.\u5c06A\uff08-1\uff0c4\uff09\u4ee3\u5165y=m/x\u5f97m=-4
2.=\uff0c=\uff0c=\uff0c\u76f8\u4ea4
3\uff0cD\uff080\uff0c-4/a\uff09\uff0cE\uff08-1\uff0c-4/a\uff09\uff0c
\u7531AD=BC\uff0c\u7528\u52fe\u80a1\u5b9a\u7406\u53ef\u4ee5\u6c42\u51faa=-2\uff0cb=2\uff0c\u6b64\u65f6\u76f4\u7ebfAB\u4e3ay=2x+6
S2=5+7=2*3-1+2*4-1
S3=9+11=2*5-1+2*6-1
.......
S20=2*39-1+2*40-1=156
S20=（77+79）*2*1/2=156
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绛旓細9x^2(x-1)^2-3(x^2-x)-56 =9x^2(x-1)^2-3x(x-1)-56 =[3x(x-1)-8][3x(x-1)+7] =(3x^2-3x-8)(3x^2-3x+7) 鏈夌悊鏁扮粌涔 缁冧範涓(B绾) (涓)璁＄畻棰: (1)23+(-73) (2)(-84)+(-49) (3)7+(-2.04) (4)4.23+(-7.57) (5)(-7/3)+(-7/6) (6)9/4+(-3/2) ...
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