Write as the sum and/or difference of logarithms. Express powers as factors. log9
A. log9(14
) - log9n
B. log9n - log914 - 
log9m
C. log914 + 
log9m - log9n
D. log914 ? 
log9m ÷ log9n
Answer: C
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approximate 
by calculatiang the Riemann sum 
, assuming that 
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