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Find the sum of the first 7 terms of the following geometric sequence:

3 , 1 , 1/3 , 1/9 , 1/27 , …

Hint: S = a(1-r^n)/ 1-r

Find the sum of the first 7 terms of the following geometric sequence 3 1 13 19 127 Hint S a1rn 1r class=