15x^2n+3-25x^n+1+5x^n-1
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15x^2n+3-25x^n+1+5x^n-1
15x^2n+3-25x^n+1+5x^n-1
15x^2n+3-25x^n+1+5x^n-1
15x^(2n+3)-25x^(n+1)+5x^(n-1)
=5x^(n-1)[3x^(n+4)-5x²+1]
因式分解 15x^(2n+3)-25x^(n+1)+5x^(n-1)
15x^2n+3-25x^n+1+5x^n-1 分解因式
分解因式 15x^2n+3-25x^n+1+5x^n-1
15x^2n+3-25x^n+1+5x^n-1
15x^2n+3-25x^n+1+5x^n-1 分解因式
(4x^n-2x^n-1-3x^n+2)÷(-5x^n-1)
x^n-1(3x^n+4x^n+1-5x^n+2)
x^n*x^n+1*(-x)^2n*x+(-x)^2n+3x^2n-2*x
(-x)^3x^n-1+x^2n(-x)^3
因式分解:15x的2n+3次方-25x的n+1次方+5x的n-1次方
约分(x^n+2)+(x^n+1)-6x^n/(2x^n+1)+5x^n-(3x^n-1)
x^(n)*x^(n+1)+x^(2n)*x
计算(x^(2n)+x^n+1)(x^(3n)-x^(2n)+1)
求和:Sn=1-3x+5x^2-7x^3+.+(2n+1)(-x)^n(n属于N*)
(-x^2n-2)*(-x)^5÷[x^n+1*x^n*(-x)]=?
(-x^2n-2)(-x)^5÷[x^n+1·x^n`(-x)]
15X^N+1-25X^N+5X^N-1 分解因式
f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n