How many terms of a geometry series of 1 + 4 + 16 + 64 + will make a sum of 5461?
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Answer:
no. of terms : 7
Step-by-step explanation:
sum (Sn) :a* (R power n-1)(R-1)
5461 : 1* (4 power n-1)/3
4 power n : 16383 add 1
4 power n : 16834
4 power n: 4 power 7
so, n : 7
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