Ответ:
[tex]\lim_{x\to 4} ( \frac{x - 4}{ {x}^{2} - 1} ) = \frac{\lim_{x\to 4} (x - 4)}{\lim_{x\to 4}( {x}^{2} - 1) } = \frac{\lim_{x\to 4} (x) - \lim_{x\to 4} (4)}{\lim_{x\to 4}( {x}^{2} ) - \lim_{x\to 4}(1) } = \frac{4 - 4}{ {(\lim_{x\to 4}( {x})) }^{2} - 1 } = \frac{4 - 4}{ {4}^{2} - 1 } = \frac{0}{ {4}^{2} - 1} = 0 \\ [/tex]
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Answers & Comments
Ответ:
[tex]\lim_{x\to 4} ( \frac{x - 4}{ {x}^{2} - 1} ) = \frac{\lim_{x\to 4} (x - 4)}{\lim_{x\to 4}( {x}^{2} - 1) } = \frac{\lim_{x\to 4} (x) - \lim_{x\to 4} (4)}{\lim_{x\to 4}( {x}^{2} ) - \lim_{x\to 4}(1) } = \frac{4 - 4}{ {(\lim_{x\to 4}( {x})) }^{2} - 1 } = \frac{4 - 4}{ {4}^{2} - 1 } = \frac{0}{ {4}^{2} - 1} = 0 \\ [/tex]