limit as x approaches (3pi)/4 of 2cos(x)

解答

x \to \frac{3 π}{4} lim (2 cos (x))

- 2

十进制

- 1.41421 \dots

求解步骤

x \to \frac{3 π}{4} lim (2 cos (x))

代入值

x = \frac{3 π}{4}

= 2 cos (\frac{3 π}{4})

化简

2 cos (\frac{3 π}{4}) : - 2

= - 2

x \to 101 lim (\frac{x}{x + 4})

x \to 2 + lim (\frac{x + 1}{3 x - 6})

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

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

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