limit as x approaches 1 of (11x^2-99)/(x^2-20x+51)

解答

x \to 1 lim (\frac{11 x ^{2} - 99}{x ^{2} - 20 x + 51})

- \frac{11}{4}

十进制

- 2.75

求解步骤

x \to 1 lim (\frac{11 x ^{2} - 99}{x ^{2} - 20 x + 51})

代入值

x = 1

= \frac{11 \cdot 1 ^{2} - 99}{1 ^{2} - 20 \cdot 1 + 51}

化简

\frac{11 \cdot 1 ^{2} - 99}{1 ^{2} - 20 \cdot 1 + 51} : - \frac{11}{4}

= - \frac{11}{4}

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