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Find the sum of the first 15 terms of...

Find the sum of the first 15 terms of each of the following sequences having `n t h` term as `x_n=6-n` (ii) `y_n=9-5n`

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RD SHARMA-ARITHMETIC PROGRESSIONS-All Questions
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  2. Find the sum of the first 15 terms of each of the following sequenc...

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