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ICSE Class 10 Answered

in a gp find the tenth term and the sum of first seven terms of 1/2, 1/3, 2/9...
Asked by sudeepguptaa | 28 Nov, 2018, 03:12: PM
answered-by-expert Expert Answer
begin mathsize 16px style Here space straight a equals space 1 half space and space straight r space equals space 2 over 3
straight i. space Tenth space term space equals space ar to the power of straight n minus 1 end exponent space equals space ar to the power of 9
ii. space Sum space of space first space seven space terms space equals space fraction numerator straight a open parentheses straight r to the power of straight n space minus space 1 close parentheses over denominator straight r space minus space 1 end fraction equals space fraction numerator straight a open parentheses straight r to the power of 7 space minus space 1 close parentheses over denominator straight r space minus space 1 end fraction
Substitute space the space values space and space get space the space answer end style
Answered by Yasmeen Khan | 28 Nov, 2018, 04:25: PM
ICSE 10 - Maths
Asked by sudeepguptaa | 28 Nov, 2018, 03:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by anandarajgowri | 24 Jul, 2018, 08:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
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