memorize this pattern:
2^3 = 8 <-----> log2 8 = 3
once you know it, these questions become easy
e.g.
y = (7/8)^x <---> log(7/8) y = x
y = log 12x <---> 10^y = 12x
etc
Rewrite the following exponential functions as logarithmic functions, and the logarithmic functions as exponential functions:
f(x)=(7/8)^x
b)
f(x)=log12x
c)
f(x)=log5/9x
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