(8O十X)×0.8十16=140怎样解
1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)=
5(x十20)一3(x十7)=100怎样解方程
1十2十3十4十5+6+7十8十9十10十10000O
2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥
已知f(x)=2X十|,X≥O;X^2十4,x
10一9.8十9.6一9.4十9.2一9+...十O.8一0.6十O.4一O.2怎样简便计算求过程
(6x-12)(8x十5)-(8x一7)(6x一12)=o 解方程
0.|十0.2十0.3十0.4十0.5十0.6十0.7十0.8十0.9怎样巧算
已知1十x十x^2 十x^3=0,求x十x^2十x^3十x^4+x^5十x^6+x^7十x^8的值
1十1/2十1/3十1/4十1/5十1/6+1/7十1/8+1/9+1/1O=?
1十2十3十4十5十6十7+8十9*o二几
100十4十7十8十1十1十1十8=?