(n+1)2÷(n+1)2+1=0.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 08:33:28
xN@_P hdx f] 7nƿRWUi]7i`쮯PqŽ9!C=23ack'8:F:[Jg~,g \֦w{\xeɐbILPBi-?&:ݤɕ@:FKj"U璤n"ci3!c #l-ރ^_Obzvz^%]+`%AN*hɸĭ]FEj ~'nD>X2v1R4v ]ea:PpÒ!4 Bo,ߕ
2^n/n*(n+1)
f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n
证明不等式:(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
n+(n-1)÷2×n 求化简
当n为正偶数,求证n/(n-1)+n(n-2)/(n-1)(n-3)+...+n(n-2).2/(n-1)(n-3)...1=n
2n*1/2^n=n/2^(n-1)?
阶乘(2n-1)!=(2n)!/(2^n*n!
为什么n!/(2!(n-2)!)=n(n-1)/2!
高数题:n趋近于0,lim{1/(n^2+n+1)+2/(n^2+n+2)+3/(n^2+n+3)+.+n/(n^2+n+n)}=?
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?
(n+2)!/(n+1)!
为什么:n×(n+1)=1/3[n(n+1)×(n+2)-(n-1)×n×(n+1)]
为什么n(n+1)(n+2)(n+3)=(n²+3n+2)(n²+3n)?
n(n+1)/1+(n+1)(n+2)/1+.+(n+2007)(n+2008)/1=?
数列a(n)=n (n+1)(n+2)(n+3),求S(n)
n+(n+1)+(n+2)+(n+3)+(n+4)=5n+10这道题怎么解
n(n-1)(n-2)(n-3)(n-4)=154440.求N值 要步骤
证明:c(n,0)c(n,1)+c(n,1)c(n,2)+...c(n,n-1)c(n,n)=c(2n,n-1)