Question

In: Advanced Math

Find the common ratio for the geometric sequence 2.5, 5, 10, 20, …

Find the common ratio for the geometric sequence 2.5, 5, 10, 20, …

Solutions

Expert Solution

Consider the geometric sequence,

2.5, 5, 10, 20, …

 

Compute the common ratio of given geometric sequence by find the ratio of second term to the first term.

r = a2 ÷ a1

   = 5 ÷ 2.5

   = 2

Therefore, common ratio of given geometric sequence is r = 2.
Therefore, common ratio of given geometric sequence is r = 2.

Therefore, common ratio of given geometric sequence is r = 2.

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