Precalculus Examples

$\log_{2} (y) = 4$

Step 1

Rewrite $\log_{2} (y) = 4$ in exponential form using the definition of a logarithm. If $x$ and $b$ are positive real numbers and $b \neq 1$ , then $\log_{b} (x) = y$ is equivalent to $b^{y} = x$ .

$2^{4} = y$

Step 2

Solve for $y$ .

Tap for more steps...

Step 2.1

Rewrite the equation as $y = 2^{4}$ .

$y = 2^{4}$

Step 2.2

Raise $2$ to the power of $4$ .

$y = 16$