x^n-1(3x^n+4x^n+1-5x^n+2)
计算(x^(2n)+x^n+1)(x^(3n)-x^(2n)+1)
因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2)
分解因式:-2X^(5n+1)Y^n+4X^(3n+1)Y^(n+2)-2X^(n+1)Y^(n+4)
求和:Sn=1-3x+5x^2-7x^3+.+(2n+1)(-x)^n(n属于N*)
C语言 f(x)=1+x+x^2/2!+x^3/3!+...+x^n/n!直到|x^n/n|
幂级数[(-1)^n/3^n]x^n (|x|
x^2n(x^2-2n-2x^1-2n+x^-2n)
计算:(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4
求极限lim(x→∞)(1/n+2/n+3/n..+n/n)
(-X^5)*X^3N-1+X^3N*(-X)^4
4(x-y)^n+1-3(y-x)^n
-1+3-5+...+(-1)^n(2n-1)=(-1)^n X n