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nth Term of A.P

Solve : S3 ...

Question

Solve : $S_{3} = 9, S_{7} = 49$ , find $S_{n}$ and $S_{10}$

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Solution

$s_{3} = 9, s_{7} = 49$
$s_{n} = (n)^{2} = n^{2}$
$s_{10} = 10^{2} = 100$

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