limit as h approaches infinity of h^2-3h

解答

h \to \infty lim (h^{2} - 3 h)

\infty

求解步骤

h \to \infty lim (h^{2} - 3 h)

运用无穷大属性:

x \to \pm \infty lim (a x^{n} + \dots + b x + c) = \infty, a > 0,

n is even

a = 1, n = 2

= \infty

y^{^{''}} + 4 y^{^{'}} + 6 y = cos (x)

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

\frac{d}{d x} (\frac{5 x + 2}{x + 1})

in v erse l a pl a ce \frac{4}{s + 4}

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