x^(n)*x^(n+1)+x^(2n)*x
x^2n(x^2-2n-2x^1-2n+x^-2n)
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)
C语言 f(x)=1+x+x^2/2!+x^3/3!+...+x^n/n!直到|x^n/n|
单项式乘以多项式(x^n-x^n-1+x)*x^n+1(x^2n+1)(-x^2n)(+x^n+2)
求极限lim [x^(n+1)-(n+1)x+n]/(x-1)^2 x趋于1
数学x^n*x^n+1+x^2n*x在线等.
信号与系统中 y(n)=x(n)+x(n+1)如果|x(n)|≤M, 则|y(n)|≤|x(n)|+|x(n+1)|≤2
计算:(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4
x(n+1)
计算(-x)^2n十1.(-x)^n+1
幂级数[(-1)^n/3^n]x^n (|x|