题目
3 (2024,4题,5分)已知数列(a_{n)}(a_(n)≠0),若(a_{n)}发散,则A. a_(n)+(1)/(a_(n))发散.B. a_(n)-(1)/(a_(n))发散.C. e^a_(n)+(1)/(e^a_(n))发散.D. e^a_(n)-(1)/(e^a_(n))发散.
3 (2024,4题,5分)已知数列{a_{n}}(a_{n}≠0),若{a_{n}}发散,则
A. $a_{n}+\frac{1}{a_{n}}$发散.
B. $a_{n}-\frac{1}{a_{n}}$发散.
C. $e^{a_{n}}+\frac{1}{e^{a_{n}}}$发散.
D. $e^{a_{n}}-\frac{1}{e^{a_{n}}}$发散.
题目解答
答案
D. $e^{a_{n}}-\frac{1}{e^{a_{n}}}$发散.