Question

an+1=(-1)²5an+8°a1=2

Answer 1

Ответ:

a1-5 a2-5 + 12-7 d-a2-a1-7 - (- 5) -12 S6- (2a1 + 5d) '6 / 2- (10 + 60) * 3-50 * 3- 150