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How to Find the Inverse of a Function

If fx=2x-5,...

Question

If $f (x) = 2 x - 5$ , then what is $f (0)$ ?

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Solution

$f (0) = - 5$
To solve the problem substitute $0$ for each occurrence of $x$ in the function and the calculate the result.
$f (x) = 2 x - 5$ becomes
$f (0) = (2 \times 0) - 5$
$f (0) = 0 - 5$
$f (0) = - 5$

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