Question

помогите пжжж!!!!!сделайте 3-4!!!!С РЕШЕНИЕМ

Answer 1

№3 (а)
$b_{6}$  = 25 = $b_{1}$ * $d^{5}$
$b_{8}$ = 9 =$b_{1}$ * $d^{7}$$b_{1}$ = $b_{8}$ / $d^{7}$ =
$b_{6}$ / $d^{5}$9 / $d^{7}$ = 25 / $d^{5}$25 * $d^{7}$ = 9 * $d^{5}$$d^{2}$ = 9 / 25$d^{2}$ = ±3 / 5

(б)$b_{2}$  = 25 = $b_{1}$ * $d^{1}$
$b_{4}$ = 1 =$b_{1}$ * $d^{3}$$b_{1}$ = $b_{2}$ / $d^{1}$ =
$b_{4}$ / $d^{3}$25 / $d^{1}$ = 1 / $d^{3}$25 * $d^{3}$ = 1 * $d^{1}$$d^{2}$ = 1 / 25$d^{2}$ = ±1 / 5