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If for a sequence (t_{n}), S_{n}= 2n^{2 , find (t_{n}) and show that the sequence is an A.P. ii) If for a sequence (t_{n}), S_{n}=4n^{2 ...
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(m + 2n)² = (m)² + 2 (m) (2n) + (2n)²
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