Answer
A = C+D
Work Step by Step
Given
(a). $b^{A}$ = M*N
(b). $b^{C}$ = M
(c). $b^{D}$ = N
By multiplying (b) and c)
(d). $b^{C}$ $\times$$b^{D}$ = $b^{C + D}$= M*N
by comparing (a) and (d)
A = C+D
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.