limit as x approaches 5 of sqrt(3x^2+5)

解答

x \to 5 lim (3 x^{2} + 5)

45

十进制

8.94427 \dots

求解步骤

x \to 5 lim (3 x^{2} + 5)

代入值

x = 5

= 3 \cdot 5^{2} + 5

化简

3 \cdot 5^{2} + 5 : 45

= 45

\frac{d}{d x} (\frac{2}{3} x^{2})

\frac{d}{d x} (\frac{c ^{6} - x ^{6}}{c ^{6} + x ^{6}})

n = 1 \sum \infty (\frac{1}{n + 1})^{2}

\int_{0}^{2} π (x^{3} - 8)^{2} d x

(x^{2} + y^{2} - 5) d x = (y + x y) d y, y (0) = 1