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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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Read 2 more answers
Which equation has the solution x = 9?
zepelin [54]

Answer: the answer is 2x-3=15

Step-by-step explanation: It’s simple so whenever you see x in the equation you just plug 9 in it’s place for example:

equation 1: 2x-3=15 —> 2(9)=18-3= 15 for this equation 9 is the solution

equation 2: 4+5(9)=18 —> 4+45=49 and 49 does NOT equal to 18 therefor 9 is not a solution

equation 3: 3(9)+2= 29 and 29 does NOT equal to 25 so 9 is not the solution

equation 4: 81(9)-3=6 —> 726 does NOT equal to 6 so not a solution

equation 5: 24-2(9)=13–> 6 does not equal to 13 so 9 is not a solution

equation 6: 3(9)+7=8 —> 34 does not equal to 8 so 9 is not a solution

(hope this helps)

6 0
2 years ago
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