limit as x approaches-2+of (x^2)/(x+2)

解

x \to - 2 + lim (\frac{x ^{2}}{x + 2})

\infty

解答ステップ

x \to - 2 + lim (\frac{x ^{2}}{x + 2})

\frac{x ^{2}}{x + 2} = x^{2} \frac{1}{x + 2}

= x \to - 2 + lim (x^{2} \frac{1}{x + 2})

x \to a lim [f (x) \cdot g (x)] = x \to a lim f (x) \cdot x \to a lim g (x)

不定形式の場合を除く

= x \to - 2 + lim (x^{2}) \cdot x \to - 2 + lim (\frac{1}{x + 2})

x \to - 2 + lim (x^{2}) = 4

x \to - 2 + lim (\frac{1}{x + 2}) = \infty

= 4 \cdot \infty

無限大の特性を適用する:

c \cdot \infty = \infty

= \infty