Evaluate the following limits:

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Since the form is indeterminant
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Method 1: factorization



Since a2-b2 = (a + b)(a-b)


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= (2 + 2)(22 + 22)
= 32
Method 2: By L hospital rule:
Differentiating numerator and denominator separately:
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= 4(2)3
= 32
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