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3 years ago

Find the 11th term of the geometric sequence 10, 20, 40, ...10,20,40,

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

8 0

11th term is 10240

Step-by-step explanation:

Step 1: Given the sequence 10,20,40. So a(1) = 10, common ration, r = 20/10 = 2 Find the 11th term using the nth term formula, a(n) = ar^n-1

⇒ a(11) = 10 × 2^10 = 10 × 1024 = 10240

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