1.

The necessary condition for a series \(\sum {{u_n}} \) to converge is that

A. \(\mathop {\lim }\limits_{n \to \infty } {u_n} \to 0\)
B. \(\mathop {\lim }\limits_{n \to \infty } {u_n} =1\)
C. \(\mathop {\lim }\limits_{n \to \infty } {u_n} = -1\)
D. None of these
Answer» E.


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