Write the expression as a single logarithm with coefficient 1. Assume all variables represent positive real numbers with 
and 
.
logb 2y + 
logb (4y2)
A. logb (8y39/40)
B. logb (239/20 y63/40 )
C. logb (8y9/10)
D. logb (2112/45 y112/45)
Answer: D
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A. 
B. 
C. 
D. 
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A. 
B. 
C. 
D. 