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lara [203]
3 years ago
13

Complete the recursive formula of the geometric sequence 7, -14, 28, -56, ....

Mathematics
1 answer:
Dafna11 [192]3 years ago
4 0

Answer:

a_{n} = - 2a_{n-1}

Step-by-step explanation:

A geometric recursive formula has the form

a_{n} = ra_{n-1}

where r is the common ratio

Here r = - 14 ÷ 7 = - 2, thus

a_{n} = - 2a_{n-1} with a₁ = 7

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