因式分解 n^4+11n^2+6n^3+6n+1
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2)
[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简
(m-n)(m-n+2)-6因式分解
a^(n-1)+3a^(n)-6a^(n-2)因式分解..
Sn=n(n+2)(n+4)的分项等于1/6[n(n+2)(n+4)(n+5)-(n-1)n(n+2)(n+4)]吗?
已知888个连续正整数之和:n+(n+1)+(n+2)+(n+3)+(n+4)+(n+5)+(n+6)+(n+7)+··
证明不等式:(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
如果正整数n使得[n/2]+[n/3]+[n/4]+[n/5]+[n/6]=69,则n=
因式分解(m-n )^6-(m+n)^6
因式分解 4n^2-(m+n)^2
因式分解m^2-(n+1)m+n