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CBSE Class 11-commerce Answered

1+4+16+64---------------=5461 Find n
Asked by deepakagarwal1024 | 24 Dec, 2018, 07:42: PM
answered-by-expert Expert Answer
1+4+16+64---------------=5461 is the sum of GP
begin mathsize 18px style straight S equals fraction numerator straight a open parentheses straight r to the power of straight n minus 1 close parentheses over denominator straight r minus 1 end fraction 5461 equals fraction numerator 1 open parentheses 4 to the power of straight n minus 1 close parentheses over denominator 3 end fraction 16384 equals 4 to the power of straight n straight n equals 7 end style
Answered by Arun | 26 Dec, 2018, 09:18: AM

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