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Evaluate lim(x to 1) (x^(3) - 1)/(x - 1)...

Evaluate `lim_(x to 1) (x^(3) - 1)/(x - 1)`

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The correct Answer is:
3
`underset(x to 1)(lim) (x^(3) - 1)/((x - 1)) = underset(x to 1)(lim) ((x - 1)(x^(2) + 1 + x))/((x - 1))`
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