If $f (x) = 2 x - 1$ and $g (x) = 3 x + 2$ , then find $(f o g) (x)$ :

2 (3 x + 1)

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2 (3 x + 2)

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3 (2 x + 1)

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3 (3 x + 1)

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Solution

The correct option is C $3 (2 x + 1)$
$f o g (x) = 2 (3 x + 2) - 1 = 6 x + 4 - 1 = 6 x + 3 = 3 (2 x + 1)$

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