Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.log5

A.  log5r +  log5s -  log5u
B.  log5r +  log5s - 2 log5u
C. 9 log5r + 4 log5s - 2 log5u
D.  log5r ?  log5s ÷ 2 log5u


Answer: B

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