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ICSE Class 10 Answered

how many terms are there in a gp 3,3^2,3^3..... are needed to give the sum 120    
Asked by sajikumar3816 | 28 Jun, 2018, 08:47: PM
answered-by-expert Expert Answer
begin mathsize 16px style 120 equals fraction numerator 3 open parentheses 3 to the power of straight n minus 1 close parentheses over denominator 3 minus 1 end fraction 80 equals open parentheses 3 to the power of straight n minus 1 close parentheses straight n equals 4 end style
Answered by Arun | 29 Jun, 2018, 05:46: PM

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ICSE 10 - Maths
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