Precalculus Examples

$f (2) = 2 x + 1$

Step 1

Replace the variable $x$ with $2$ in the expression.

$f (2) = 2 (2) + 1$

Step 2

Simplify the result.

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Step 2.1

Multiply $2$ by $2$ .

$f (2) = 4 + 1$

Step 2.2

Add $4$ and $1$ .

$f (2) = 5$

Step 2.3

The final answer is $5$ .

$5$

Step 3