求x^3-x
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
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
求x/(x+1)(x+2)(x+3)的不定积分
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
若多项式2x*x*x*x-3x*x*x+ax*x+7x+b能被x*x+x-2整除,求a:b
f(x)=3^x+x^3+x^(x)sinx 求f'(x)
已知x*x-3x+1=0求√(x*x+1/x-2)=?
y=(2x*x-2x+3)/(x*x-x+1),求值域?
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?
3^x=2^x,求x.5^(x-1)·10^3x=8^x求x
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