limit as x approaches infinity of 4^x+5

解答

x \to \infty lim (4^{x} + 5)

\infty

求解步骤

x \to \infty lim (4^{x} + 5)

x \to a lim [f (x) \pm g (x)] = x \to a lim f (x) \pm x \to a lim g (x)

不定型除外

= x \to \infty lim (4^{x}) + x \to \infty lim (5)

x \to \infty lim (4^{x}) = \infty

x \to \infty lim (5) = 5

= \infty + 5

运用无穷大属性:

\infty + c = \infty

= \infty

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\int \frac{1}{x ^{2} - 2 x + 10} d x

49 y^{^{''}} + 28 y^{^{'}} + 4 y = 0

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