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ksgo2016
@ksgo2016
July 2022
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Ребят, помогите, срочно нужно
В геометрической прогрессии (bn) найдите
1) b5, если b1=3√2 q=-√2
2) b1, если b6=-1/4, q=1/2
3) q, если b1=0,5, b4=500
4)b1 и q, если b2=4, b4=1
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TARTILLO
Verified answer
В геометрической прогрессии (bn) найдите
1) b5, если b1=3√2 q=-√2 b5=b1
·q⁴=3√2 ·(-√2)⁴= 3√2 ·(2)=6√2
2) b1, если b6=-1/4, q=1/2
b6=b1·q⁵ ⇒b1=b6/q⁵ =(-1/4)/(1/2)⁵=-32/4=-8
3) q, если b1=0,5, b4=500
b4=b1·q³ 500=0.5 ·q³ q³ =500/(0,5)=1000
q=10
4)b1 и q, если b2=4, b4=1
b2=b1·q b1·q=4,
b4=b1·q³ b1·q³=1 ⇔q²=1/4 ⇔ 1) q =1/2 2) q=-1/2
b1=8 b1=-8
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Answers & Comments
Verified answer
В геометрической прогрессии (bn) найдите1) b5, если b1=3√2 q=-√2 b5=b1·q⁴=3√2 ·(-√2)⁴= 3√2 ·(2)=6√2
2) b1, если b6=-1/4, q=1/2 b6=b1·q⁵ ⇒b1=b6/q⁵ =(-1/4)/(1/2)⁵=-32/4=-8
3) q, если b1=0,5, b4=500 b4=b1·q³ 500=0.5 ·q³ q³ =500/(0,5)=1000
q=10
4)b1 и q, если b2=4, b4=1
b2=b1·q b1·q=4,
b4=b1·q³ b1·q³=1 ⇔q²=1/4 ⇔ 1) q =1/2 2) q=-1/2
b1=8 b1=-8