Subtract 7 from 9. You get 2. It is the "extra". The answer, therefore is 1 2/7
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Answer:

Step-by-step explanation:
Explicit formula is used to represent all the terms of the geometric sequence using a single formula.

Here, a is the first term.
r is the common ratio.
r = second term ÷ first term
4, 8,16,32,64,.....
a = 4
r = 8 ÷4 = 2



Answer:
Step-by-step explanation:

it becomes

Done