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5-130.

OLD SOFTWARE    

Old computer programs used to only allow exponential functions with a certain base. If you needed an exponential in a different base, it had to be converted first. At right is the procedure for rewriting a base 2 exponential function with a base of 10. Use this technique to rewrite y = 3x as an exponential function with a base of 10.

y = 2x

log y = x log 2

y = 10x log 2

Notice the second step of the model problem above. It is the Power Law of Logarithms; this law will become more and more necessary as this course progresses.