Q. 74.4( 18 Votes )

Evaluate the foll

Answer :



Since the form is indeterminant



Method 1: factorization





Since a3-b3 = (a-b)(a2 + b2 + ab) & a2-b2 = (a + b)(a-b)





= 3


Method 2: By L hospital rule:


Differentiating numerator and denominator separately:






= 3

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