\(\begin{array} {l c} {\text{Suppose we want to evaluate} \log_{a}M} & {\log_{a}M} \\ {\text{Let} \:y =\log_{a}M. }&{y=\log_{a}M} \\ {\text{Rewrite the epression in exponential form. }}&{a^{y}=M } \\ ...Suppose we want to evaluatelogaMlogaMLety=logaM.y=logaMRewrite the epression in exponential form. ay=MTake the logbof each side.logbay=logbMUse the Power Property.ylogba=logbMSolve fory.y=logbMlogbaSubstiturey=logaM.logaM=logbMlogba