Question

_H_E_L_P_ с алгеброй D;

Answer 1

-1,75=-7/4

В

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Answer 2

$b_{12} = -8, b_{13}=14\ q=?\ left { {{b_{12}=b_1*q^{12-1} atop {b_{13}=b_1*q^{13-1}}} right.\ \ left { {{-8=b_1*q^{11} atop {14=b_1*q^{12}}} right.\ \ left { {{b_1=-frac{8}{q^{11}} atop {14=b_1*q^{12}}} right.\ \14=-frac{8}{q^{11}}*q^{12}\ \ 14=-8*q\ q=-frac{14}{8}=-frac{7}{4}$

Ответ: $-frac{7}{4}$