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Question

$a_{n} = \frac{n^{2}}{2^{n}}; a_{7}$

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Solution

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We have $a_{n} = \frac{n^{2}}{2^{n}}$
For $a_{7}$ , $n = 7$
$∴ a_{7} = \frac{7^{2}}{2^{7}} = \frac{49}{128}$

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Q1

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Q2

If

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