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WAEC Further Mathematics 2011 Paper

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Question : 13

Total: 40

Find

\lim\limits_{x\to 3}\frac{x+3}{x^{2}-x-12}

-1
$\frac{-1}{7}$
$\frac{1}{7}$
1

Solution:

$\lim\limits_{x\to 3}\frac{x+3}{x^{2}-x-12} = \frac{3+3}{3^{2}-3-12}$

= $\frac{6}{-6} = -1$

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