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

解答

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

9

求解步骤

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

代入值

x = - 1

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

化简

3 (- 1)^{2} - 3 (- 1) + 3 : 9

= 9

\frac{d}{d x} ((- 1)^{n} x^{n})

\int \frac{1}{x ^{4}} - \frac{1}{4 x} + 4 d x

\frac{d}{d x} (\frac{1 + x}{x})

y^{^{''}} + 2 y^{^{'}} - 3 y = 0, y (0) = 4, y^{^{'}} (0) = 1

d er i v a t i v e f (x) = \frac{9}{x - 6}