简便方法计算:1/n+1+1/n+2+1/n+3+1/n+4+…+1/n+100
简便方法计算:1/n+1+1/n+2+1/n+3+1/n+4+…+1/n+100
证明不等式:(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
计算:n(n+1)(n+2)(n+3)+1
用夹逼准则和重要极限两种方法计算极限lim(2^n+3^n+4^n+5^n+6^n)^(1/n)n趋近于...
计算:C(1,n)+2C(2,n)+3C(3,n) + … + nC(n,n)
如果,n是大于2的整数,计算1/(n-1)(n-2)+1/(n-2)(n-3)+1/(n-3)(n-4)+……+1/(n
2^n/n*(n+1)
(1/(n^2 n 1 ) 2/(n^2 n 2) 3/(n^2 n 3) ……n/(n^2 n n)) 当N越于无穷大
[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简
化简:1/(n+1)(n+2)+1/(n+2)(n+3)+1/(n+3)(n+4)
(n+1)(n+2)/1 +(n+2)(n+3)/1 +(n+3)(n+4)/1
(n-1)(n-2)(n-3)(n-4)……(n-m+1)(n-m)n大于m 的计算公式