Given the sequence 7, 14, 28, 56, ..., which expression shown would give the tenth term? 7^10 7•2^10 7•2^9

Question

Mathematics

Khalil

7 November, 13:51

Given the sequence 7, 14, 28, 56, ..., which expression shown would give the tenth term? 7^10 7•2^10 7•2^9

+2

Answers (1)

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Lana Mcgrath · Answer 1

Each term is 2 times the previous

geometric series

an=a1 (r) ^ (n-1)

an=nth term

a1=first term

n=which term

r=common ratio

common ratio is 2

first term is 7

n=10

so

7 (2) ^ (10-1)

7 (2) ^9

last option is the answer