Determine the infinite limit.(adsbygoogle = window.adsbygoogle || []).push({});

lim x->4+ ln(x^2-16)

I know from graphing the equation and doing a table that the limit is -infinity, but my book is saying to do the following.

Let t = x^2-16, Then as x->4+, t->0+, and lim x->4+ ln(x^2-16)=lim t->0+ ln(t) by 3

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# Homework Help: Limit of natural log

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