10x^20-6x^n+(x^n+1-9x^2n)-(4x^n+x^n+1)等于多少

10x^20-6x^n+(x^n+1-9x^2n)-(4x^n+x^n+1)等于多少 因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2) 因式分解4x^n+2-9x^n+6x^n-1-x^n-2 4x^n+2-9x^n+6x^n-1-x^n-24x^(n+2)-9x^n+6x^(n-1)-x^(n-2),n是整数且大于2 9x^(n+1)-36^n+36x(n-1) 9x^(n+1)-36^n+36x(n-1) 分解因式：-9x^(n+1)-6x^n+3x^(n-1) x^(n)*x^(n+1)+x^(2n)*x 10x的平方n-6x的n次方+(x的n+1次方-9x的平方n)-(4x的n次方+x的n+1次方) 求不等式x/2+x/6+x/12+x/20+...+x/(n-1)n>n-1的解集 MATLAb编程解方程clear;clcsyms xfor n=1:6X2=solve('(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)+1e-n*x^19=0',x);double(X2)end与直接代入n=1,2,...6算出来 f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n 3x的n+1次方+10x的n次方-7x)+(x-9x的n+1次方-10x的n次方) 若(x^2+1/x)^n(n∈N+,n 因式分解：(x^n+1)+(2x^n)+(x^n-1) x^n+1-2x^n+x^n-1因式分解 x^n-1-2x^n+x^n-1因式分解 分解因式x^n-x^(n-1)+x^(n-2)