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OpenStudy (johnnydicamillo):
Help me break down this equation so that I can find the limit
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OpenStudy (johnnydicamillo):
\[\lim_{a \rightarrow 81} \frac{ 81-a }{ 9-\sqrt{a} }\]
OpenStudy (johnnydicamillo):
I see this is a \[\frac{ 0 }{0 }\] case
OpenStudy (johnnydicamillo):
so what can I do to this so that I can plug in 81?
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