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Real Valued Functions

For the pair ...

Question

For the pair of functions,
$f (x) = 9 x - 4, g (x) = 7 x - 9$
Find $(f - g) (x)$ .

16 x - 13

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2 x + 5

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2 x - 13

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- 2 x - 5

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Solution

The correct option is B $2 x + 5$
$(f - g) (x) = f (x) - g (x) = 9 x - 4 - 7 x + 9 = 2 x + 5$

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