Ratios, Geometric sequences? Anyone good at this?

Question

Use the geometric sequence of numbers 1, 2, 4, 8,…to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
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b) Using the formula for the nth term of a geometric sequence, what is the 24th term?
Answer:
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c) Using the formula for the sum of a geometric series, what is the sum of the first 10 terms?
Answer:
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Answer 1

Do your own homework!