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mirstores
@mirstores
July 2022
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Ребята решите пожалуйста ! Очень срочно ! Вся надежда на вас !
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sangers
05.
b₁=243; b₄=9; bn=0,(037).
b₄=b₁q³=243*q³=9
q³=9/243=1/27=(1/3)³
q=1/3
an=a₁qⁿ⁻¹=243*(1/3)ⁿ⁻¹=3⁵*(1/3)ⁿ⁻¹=0,(037)
0,(037)=37/999=1/27 ⇒
(3⁵/(1/3))*(1/3)ⁿ=1/27
3⁶*(1/3)ⁿ=1/3³
(1/3)ⁿ=(1/3)⁹
n=9.
Ответ: n=9.
06.
b₅=∛3 b₁*b₂*b₃*b₄*b₅*b₆*b₇*b₈*b₉=?
b₁*b₁q*b₁q²*b₁q³*b₁q⁴*b₁q⁵*b₁q⁶*b₁q⁷*b₁q⁸=b₁⁹q³⁶
b₅=b₁q⁴=∛3
(b₁q⁴)⁹=b₁⁹q³⁶=(∛3)⁹=3⁹/³=3³=27.
Ответ: 27.
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Answers & Comments
b₁=243; b₄=9; bn=0,(037).
b₄=b₁q³=243*q³=9
q³=9/243=1/27=(1/3)³
q=1/3
an=a₁qⁿ⁻¹=243*(1/3)ⁿ⁻¹=3⁵*(1/3)ⁿ⁻¹=0,(037)
0,(037)=37/999=1/27 ⇒
(3⁵/(1/3))*(1/3)ⁿ=1/27
3⁶*(1/3)ⁿ=1/3³
(1/3)ⁿ=(1/3)⁹
n=9.
Ответ: n=9.
06.
b₅=∛3 b₁*b₂*b₃*b₄*b₅*b₆*b₇*b₈*b₉=?
b₁*b₁q*b₁q²*b₁q³*b₁q⁴*b₁q⁵*b₁q⁶*b₁q⁷*b₁q⁸=b₁⁹q³⁶
b₅=b₁q⁴=∛3
(b₁q⁴)⁹=b₁⁹q³⁶=(∛3)⁹=3⁹/³=3³=27.
Ответ: 27.