find the sum of 7th terms of a geometric sequence whose first term is 2 and the common ratio is 3
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find the sum of 7th terms of a geometric sequence whose first term is 2 and the common ratio is 3
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Find the sum of 7th terms of a geometric sequence whose first term is 2 and the common ratio is 3
Solution:
1st term = 2
r = 3
1st = 2
2nd = 2(3) = 6
3rd = 6(3) = 18
4th = 18(3) = 54
5th = 54(3) = 162
6th = 162(3) = 486
7th = 486(3) = 1458
Sum = 2 + 6 + 18 + 54 + 162 + 486 + 1458
Sum = 2186
Answer:
The sum of 7th terms is 2186
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