limit as x approaches-3-of 1/((x+3)^4)

解答

x \to - 3 - lim (\frac{1}{( x + 3 ) ^{4}})

\infty

求解步骤

x \to - 3 - lim (\frac{1}{( x + 3 ) ^{4}})

x

从左侧趋近于

- 3, x < - 3 \Rightarrow (x + 3)^{4} > 0

分母从右侧趋近于 0，为正值

= \infty

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