## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$(d)$
We use the definition of logarithm to rewrite a logarithmic equation as an equivalent exponential equation or the other way around: $m=\log_{a}x$ is equivalent to $a^{m}=x.$ $2^{5}=x \Leftrightarrow \log_{2}x=5$ case $(d)$