Find the sum of the first 3 terms of a geometric sequence with a=96 and r=1/4 the sum is____.

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asked Oct 15, 2017 96.3k views

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Tuya · Answer 1 · 2017-10-21T20:26:24+0000

For Geometric sequence, the next term is multiplied by the common ratio.

Common ratio, r = 1/4

1st term, a = 96

2nd term = ar = 96*1/4 = 24

3rd term = ar² = 96*(1/4)*(1/4) = 6

Sum of the first three terms = 96 + 24 + 6 = 126

Find the sum of the first 3 terms of a geometric sequence with a=96 and r=1/4 the sum is____.

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