巧算：(x-x^2-1)^2n+1(x^2-x+1)^2n+1

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 巧算：(x-x^2-1)^2n+1(x^2-x+1)^2n+1 数学x^n*x^n+1+x^2n*x在线等. 计算：(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4 计算:1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-n)(x-n-1) f(x)=x(x-1)(x-2)(x-3).(x-n),则f(x)的n+1阶求导 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