Sequence (10 18:35:56) Let the sequence {an} satisfy A1 = 9, an + 1 = - 1 / 2An + 3, find the general term formula of an (including process) | Math enthusiast | Mathematical art

Sequence (10 18:35:56) Let the sequence {an} satisfy A1 = 9, an + 1 = - 1 / 2An + 3, find the general term formula of an (including process)

An + 1 - 2 = - 1 / 2 (An-2) so an + 1 - 2 / an - 2 = - 1 / 2 is an equal ratio sequence, and then you can know. With this formula, an + 1 = Q * an + D is matched into an equal ratio, an + 1 + C = q (an + C) C = D / (Q-1)

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