已知x-2的平方根是正负2，y-2x-8的立方根是-3.求x的平方加y的平方的倒数
\u5df2\u77e5X-2\u7684\u5e73\u65b9\u6839\u662f\u6b63\u8d1f2,2X\uff0bY\uff0b7\u7684\u7acb\u65b9\u6839\u662f3\u3000\uff0c\u6c42X\u7684\u5e73\u65b9\uff0bY\u7684\u5e73\u65b9\u56e0\u6c42X-2\u7684\u5e73\u65b9\u6839\u5f97x-2\u5927\u4e8e0\uff0c\u5f97x\u5927\u4e8e2,\u7531X-2\u7684\u5e73\u65b9\u6839\u662f\u6b63\u8d1f2\u5f97x1=4\uff0cx2=0\uff08\u4e0d\u7b26\u5408\u9898\u610f\u820d\u53bb\uff09\u5c06x1=4\u4ee3\u51652X\uff0bY\uff0b7\u7684\u7acb\u65b9\u6839\u662f3\u5f97y=12,\u5219X\u7684\u5e73\u65b9\uff0bY\u7684\u5e73\u65b9=4^2+12^2=16+144=160
x-2\u7684\u5e73\u65b9\u6839\u662f\u6b63\u8d1f2
\u6240\u4ee5x-2=(\u00b12)^2=4
x=6
2x+y+7\u7684\u7acb\u65b9\u6839\u662f3
\u6240\u4ee52x+y+7=3^3=27
2*6+y+7=27
y=8
\u6240\u4ee5x^2+y=36+8=44
\u6240\u4ee5x^2+y\u7684\u5e73\u65b9\u6839=\u00b1\u221a44=\u00b12\u221a11
所以，x - 2 = 4,
y -2x -8 = -27
x = 6, y = -7
x�0�5 + 1/y�0�5 = 6�0�5 + 1/(-7)�0�5 = 36 + 1/49 = (36又49分之1)
绛旓細宸茬煡x-2鐨勫钩鏂规牴鏄璐2锛寉-2x-8鐨勭珛鏂规牴鏄-3 鎵浠ワ紝x - 2 = 4,y -2x -8 = -27 x = 6, y = -7 x�0�5 + 1/y�0�5 = 6�0�5 + 1/(-7)�0�5 = 36 + 1/49 = (36鍙49鍒嗕箣1)
绛旓細x-2=(卤2)²=4 x=6 y-28=(-3)³=-27 y=1 x+y=6+1=7 鍏剁畻鏁骞虫柟鏍鏄垰7
绛旓細x-2=4 X=6 y-2x-8=27 y=47 x^2+y^2=36+2209=2245
绛旓細鈭磝-2=(卤2)²=4 y-2x-8=(-3)³鍗硏=6 y=-11 X鍑廦鐨勭畻鏁骞虫柟鏍 =鈭氾箼6+11)=鈭17
绛旓細x-2=2²=4锛泋=6锛y-2x-8=-27;y=2x+8-27=-7;鈭磝-y鐨勭畻鏈骞虫柟鏍涓衡垰13锛涙偍濂斤紝寰堥珮鍏翠负鎮ㄨВ绛旓紝skyhunter002涓烘偍绛旂枒瑙ｆ儜 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾 濡傛灉鏈夊叾浠栭棶棰樿閲囩撼鏈鍚庡彟鍙戠偣鍑诲悜鎴戞眰鍔╋紝绛旈涓嶆槗锛岃璋呰В锛岃阿璋傜瀛︿範杩涙 ...
绛旓細瑙ｏ細鈭x-2鐨勫钩鏂规牴鏄卤2锛鈭磝-2=4锛屸埓x=6锛屸埖2x+y+7鐨勭珛鏂规牴鏄3锛屸埓2x+y+7=27锛屾妸x鐨勫间唬鍏ヨВ寰楋細y=8锛屸埓x2+y2鐨勫钩鏂规牴鏄10锛
绛旓細x=6锛寉=24锛屾墍浠ヤ唬鍏=6*锛-258锛*24=-37152
绛旓細渚濋鎰忓緱;x-2=4 鈭磝=6 y-2x-8=-27 鈭磞=-7 鈭磝²+y²=85 鍊掓暟涓1/85 浜 婊℃剰璇烽噰绾
绛旓細鍥犱负锛x-2鐨勫钩鏂规牴涓姝ｈ礋2 鎵浠ワ細x-2=4 x=2 鍥犱负锛歽-2x-8鐨勭珛鏂规牴鏄-3 鎵浠ワ細y-2脳2-8=-9锛堜唬鍏=2锛 y=3 鎵浠ワ細x骞虫柟+y骞虫柟=2脳2+3脳3=4+9=13 涓婇潰閭ｄ袱浣嶄綘浠贡璇翠粈涔堝憿- -涓涓绠楅敊璇紝涓涓紑閿骞虫柟锛骞虫柟鎬庝箞浼鏄礋鏁 ...
绛旓細x鍑2鐨勫钩鏂规牴涓姝ｈ礋2 x-2=4 x=6 2x鍔y鍔7鐨勭珛鏂规牴涓3 2x+y+7=27 2脳6+y+7=27 y=8 x骞虫柟鏍瑰姞y鐨勫钩鏂规牴 x骞虫柟鏍孤扁垰6 y鐨勫钩鏂规牴卤2鈭2 x骞虫柟鏍瑰姞y鐨勫钩鏂规牴 鈭6+2鈭2鎴栤垰6-2鈭2鎴-鈭6+2鈭2鎴-鈭6-2鈭2,1,8,0,
