2(X十3.5)=20
已知f(x)=2X十|,X≥O;X^2十4,x
X.(X十1)x(X十2)x(x十3) =360
(X十2)(X一13)一16=(X十3)( )
(x-2)十x十(X+2)=360怎么解
(2X一)(X十3)=3X十5
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
2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥
x+1/x=3,求(x^4十x^2十1)分之(x^2)
5(x十20)一3(x十7)=100怎样解方程
2(x十3)=3(0.5x十10)
解下列方程组; (1) [x十y=8,5x十1=2(x十y); (2)[2x十5y=12,2x十3y=6.
(2Xx10十X)=10X十2X十36