limit as x approaches 8 of sqrt(x^2-9)

解答

x \to 8 lim (x^{2} - 9)

55

十进制

7.41619 \dots

求解步骤

x \to 8 lim (x^{2} - 9)

代入值

x = 8

= 8^{2} - 9

化简

= 55

\int (x^{2} - 1)^{2} d x

d er i v a t i v e x^{19} e^{x}

\frac{\partial}{\partial x} (x^{2} - 1)

\frac{d}{d x} ((x^{2} + 5 x) e^{x})

\int x^{2} y d y