Use the definition of a logarithm to prove 
.Hint: Let
and 
. Then, ![]()
data-wiris-created="true" src="https://sciemce.com/media/3/ppg__cognero__5.2_Logarithmic_Functions__media__f2a16a3b-4ead-4139-b3c3-bd4bf789e4eb.PNG" style="vertical-align:middle;" /> and 
.
? ?
A. Let 
and 
so that 
and 
. Then 
and by definition, 
; that is 
.
B. Let 
and 
so that 
and 
. Then 
and by definition, 
; that is 
.
C. Let 
and 
so that 
and 
. Then 
and by definition, 
; that is 
.
Answer: B
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Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 