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Multiplication of Integers

Given a=5, ...

Question

Given $a = 5, d = 3, a_{n} = 50$ , find n.

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Solution

The correct option is A 16
$50 = 5 + 3 (n - 1)$
$\Rightarrow 3 (n - 1) = 45$
$\Rightarrow n - 1 = 15$
$\Rightarrow n = 16$

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