Question: A student writes the following:Problem: Evaluate the limit Student answer:Line 1: Direct Substitution is not possible because the denominator is 0 when .Line 2: Instead

A student writes the following:Problem: Evaluate the limit Student answer:Line 1: Direct Substitution is not possible because the denominator is 0 when .Line 2: Instead let's multiply by the conjugate (to rationalize).Line 3:

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