求证:1/2+1/3+1/4+..1/n < ln(n)
对于任意正整数n,求证:ln(1/2+1/n)>1/n^2-2/n-1
证明:ln 2/3+ln 3/4+ln 4/5+……+ln n/(n+1)1)
n 证明:(1+1/2+1/3+...+1/n)∑ln[k(k+1)(k+2)>(n-1/4)ln(e^n/n!) (n
ln(1+1/n)
证明ln(n+1)
ln(1+n)
ln(2n^2-n+1)-2ln n.当n趋于正无穷是的极限
已知x>1,求证:x>ln(1+n).
n趋向于无穷大,lim n[ln(n+2)-ln(n+1)],
ln(2n+3)/(2n+1)求极限
用数学归纳法证明证明:ln(1+1*2)+ln(1+2*3)+……+ln[1+n(n+1)]>2n-3(n属于N*)
导数练习的证明题ln(n+2)-ln(n+1)>1/(2n+3)n>2