find-the-sequence-u-n-with-verify-u-n-u-n-1-1-n-n-n-1-determine-a-equivalent-of-u-n-is-u-n-convergent-

Question Number 133536 by mathmax by abdo last updated on 22/Feb/21

find the sequence u_{n} with verify u_{n} + u_{n + 1} = \frac{{(- 1)}^{n}}{\sqrt{n}} \forall n ⩾ 1

determine a equivalent of u_{n}

is u_{n} convergent ?