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OpenStudy (diyadiya):
If \[\frac{3+5+7+...+n}{5+8+11+...+10terms}=7\] the value of n is :
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OpenStudy (anonymous):
\[\frac{3 + (n-1)2}{5 + 9*3} = 7\]
OpenStudy (anonymous):
Use sum of AP series.
OpenStudy (diyadiya):
Thankyou!
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