(-X^5)*X^3N-1+X^3N*(-X)^4
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(-X^5)*X^3N-1+X^3N*(-X)^4(-X^5)*X^3N-1+X^3N*(-X)^4(-X^5)*X^3N-1+X^3N*(-X)^4(-X^5)*X^3N-1+X^3N*(-X)^4
(-X^5)*X^3N-1+X^3N*(-X)^4
(-X^5)*X^3N-1+X^3N*(-X)^4
(-X^5)*X^3N-1+X^3N*(-X)^4
(-X^5)*X^3N-1+X^3N*(-X)^4
=-x^(5+3n-1)+x^(3n+4)
=-x^(3n+4)+x^(3n+4)
=0
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15x^2n+3-25x^n+1+5x^n-1
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已知集合P={x|x=2n,n∈N^+},集合Q={x|x=3n,n∈N*}.则P∩Q等于多少?,A,{x|x=n,n∈N*}B.{x|x=5n,n∈N*}C,{x|x=12n,n∈N*}D,{x|x=6n,n∈N*}
C语言 f(x)=1+x+x^2/2!+x^3/3!+...+x^n/n!直到|x^n/n|
sn=(x-1)+(x^2-3)+(x^3-5)+...+[x^n-(2n-1)]
(-X^5)*X^3N-1+X^3N*(-X)^4
求和:x+3x^2+5x^3+...+(2n-1)x^n