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Afina-wow [57]
2 years ago
11

If a_1=9a

Mathematics
1 answer:
pickupchik [31]2 years ago
3 0

A geometric series is the collection of an unlimited number of terms with a fixed ratio between them. The value of a₅ is -729.

<h3>What is geometrical series?</h3>

A geometric series is the collection of an unlimited number of terms with a fixed ratio between them.

Given the value of a₁=9 and the value of a_n=-3a_{(n-1)}. Therefore, the value of a₅ can be written as,

a₂ = -3(a₁) = -3(9) = -27

a₃ = -3(a₂) = -3(-27) = 81

a₄ = -3(a₃) = -3(81) = -243

a₅ = -3(a₄) = -3(-243) = -729

Hence, the value of a₅ is -729.

Learn more about Geometrical Series:

brainly.com/question/4617980

#SPJ1

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In an equation, it would expand to 10x^2-15x+4x-6

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