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In an A.P., the sum of first n terms is ...

In an A.P., the sum of first `n` terms is `(3n^2)/2+(5n)/2dot` Find its 25th term.

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
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  13. If the 8th term of an A.P. is 31 and the 15th term is 16 more than ...

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