Find the $12^{t h}$ term of the $A . P . 2, 4, 6, 8, . . . .$

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Solution

First term of AP, $a = 2$ ; common difference, $d = 4 - 2 = 2$
$n^{t h}$ term, $a_{n} = a + (n - 1) d$
$\Rightarrow a_{12} = 2 + (11) 2 = 2 + 22 = 24$ .

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