High School Algebra II Unlocked by Princeton Review

Author:Princeton Review
Language: eng
Format: epub
Publisher: Random House Children's Books
Published: 2016-08-08T16:00:00+00:00

Notice also that the graph of f −1(x) = log2x is below the x-axis for positive values less than 1. This reflects the fact that a base-2 logarithm of a proper fraction must be negative. Remember the meaning of logarithm as an exponent. The base 2 must be raised to a negative exponent to produce an x-value of 1/2, 1/4, or any positive value less than 1.

Compare the graphs of f(x) = log3x and g(x) = log1/3x.

We know that the graph of f(x) = log3x passes through (1, 0) and (3, 1), and it has a vertical asymptote of the y-axis for its left end.

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