Evaluate log base 64 of 8

$\log_{64} (8)$

Rewrite as an equation.

$\log_{64} (8) = x$

Rewrite $\log_{64} (8) = x$ in exponential form using the definition of a logarithm. If $x$ and $b$ are positive real numbers and $b$ does not equal $1$ , then $\log_{b} (x) = y$ is equivalent to $b^{y} = x$ .

$64^{x} = 8$

Create expressions in the equation that all have equal bases.

${(2^{6})}^{x} = 2^{3}$

Rewrite ${(2^{6})}^{x}$ as $2^{6 x}$ .

$2^{6 x} = 2^{3}$

Since the bases are the same, then two expressions are only equal if the exponents are also equal.

$6 x = 3$

Solve for $x$ .

$x = \frac{1}{2}$

The variable $x$ is equal to $\frac{1}{2}$ .

Factor $3$ out of $3$ .

$\frac{3 (1)}{6}$

Cancel the common factors.

Factor $3$ out of $6$ .

$\frac{3 \cdot 1}{3 \cdot 2}$

Cancel the common factor.

$\frac{3 \cdot 1}{3 \cdot 2}$

Rewrite the expression.

$\frac{1}{2}$

The result can be shown in multiple forms.

Exact Form:

$\frac{1}{2}$

Decimal Form:

$0.5$

Evaluate log base 64 of 8

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