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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Sequence and Series
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Ratio of sum of n terms of two AP's is $\;(5n+3)\;:\;(3n+4)\;,$ then the ratio of $\;15^{th}\;$ term will be :


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Answer : (b) $148:91$
Explanation : Given , $\large\frac{\frac{n}{2}\;[2a+(n-1)d]}{\frac{n}{2}\;[2A+(n-1)D]}=\large\frac{5n+3}{3n+4}$
answered Jan 22, 2014 by yamini.v

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