b₁=8 b₇=64 q-? b₅-?
b₇=b₁*q⁶=64
8*q⁶=64 |÷8
q⁶=2³
(q²)³=2³
q²=2
q=√2.
b₅=b₁*q⁴=8*(√2)⁴=8*8*2⁴/²=8*2²=8*4=32.
Ответ: q=√2 b₅=32.
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b₁=8 b₇=64 q-? b₅-?
b₇=b₁*q⁶=64
8*q⁶=64 |÷8
q⁶=2³
(q²)³=2³
q²=2
q=√2.
b₅=b₁*q⁴=8*(√2)⁴=8*8*2⁴/²=8*2²=8*4=32.
Ответ: q=√2 b₅=32.