limit as x approaches-1 of 3x^3-4x^2-3

解答

x \to - 1 lim (3 x^{3} - 4 x^{2} - 3)

- 10

求解步骤

x \to - 1 lim (3 x^{3} - 4 x^{2} - 3)

代入值

x = - 1

= 3 (- 1)^{3} - 4 (- 1)^{2} - 3

化简

3 (- 1)^{3} - 4 (- 1)^{2} - 3 : - 10

= - 10

x \to 0 lim (e^{\frac{2}{x}})

x \to 2 lim (x^{3} + 2 x - 8)

x \to 0 lim (\frac{x - 3}{x ^{2} - 9})

x \to 0 lim (\frac{x ^{2}}{x + 5})

x \to - \frac{1}{2} lim (- \frac{7}{2 x + 1})