Math, asked by SaM300000000, 1 year ago

if the ratio of sum of first n terms of two aps is (7n+1):(4n+27), then find the ratio of their 7th term

Answers

Answered by vershamishra12oycd27

92:79...............

SaM300000000: the ans is 10:11 ,could u tell how. Sorry forgot to write in the question

vershamishra12oycd27: yeah sure..

vershamishra12oycd27: let take a1,a2 and d1,d2 be the first term and commom difference ..and s1 n s2 be the sum of nterms of two AP's. then s1/s2=(7n+1)/4n+27.. after solving it u will get ths eqn (a1+(n-1/2)d1)/(a2+(n-1/2)d2)=(7n+1)/4n+27...then put (n-1/2)=8 after solving u will get the ans 92:79

vershamishra12oycd27: sry put (n-1/2)=6

SaM300000000: thanks

vershamishra12oycd27: welcome:)

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