A store manager timed Janette to see how long it would take her to fold and put away a sweater, a shirt, a pair of pants, and a
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A function has a vertical asymptote where it is not defined, and the logarithm is defined only if its argument is strictly positive: it has a vertical asymptote if its argument is zero, and is not defined if its argument is negative.
So, you have a vertical asymptote where