10.x^2-1=3x,求3x^3-11x^2+3x+2 '
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
y=(2x*x-2x+3)/(x*x-x+1),求值域?
已知x*x-3x+1=0求√(x*x+1/x-2)=?
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
求x/(x+1)(x+2)(x+3)的不定积分
3^x=2^x,求x.5^(x-1)·10^3x=8^x求x
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1