Question

Хелп не могу решить сижу уже 50 мин

Answer 1

Ответ:

1) В

$b_{1} = 5 \\ q=2$

2)

$b_{5} = b_{4}*q = 32\\ q = 32:8 = 4$

3)

$b_{6} = b_{1}*q^5 = \frac{3}{7}*(-1)^5 =- \frac{3}{7}$

4)

$b_{4} = b_{1}*q^3\\b_{2} = b_{1}*q\\ b_{4} = b_{2}*q^2\\q = \sqrt{b_{4} :b_{2} } = \sqrt{100} =10$

Answer 2

1) в

2) $q = \frac{b_5}{b_4} = \frac{8}{32 } = \frac{1}{4}$

3)

$b_{6} = b_1*q^{5}\\\\b_{6} = \frac{3}{7} * (-1)^5 = -\frac{3}{7}$

4)

$\left \{ {{b_4 = b_1*q^3} \atop {b_2 = b_1*q}} \right. \\\\\left \{ {{10 = b_1*q^3} \atop {0.1 = b_1*q}} \right. \\\\10 = b_1*q*q^2 \\0.1*q^2 =10\\q^2 = 10/0.1\\q^2 = 100\\q = 10\\q = -10$