limit as x approaches 3 of 1/x-1/3

解答

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

0

求解步骤

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

代入值

x = 3

= \frac{1}{3} - \frac{1}{3}

化简

= 0

(y x^{2} - y) d y = tan^{- 1} (x) d x

\int \frac{1}{sec ^{3} ( x )} d x

l a pl a ce t r an s f or m e^{- t} + e^{- 2 t}

a re a y = x, y = 2 x, x = 2

\frac{d}{d x} (\frac{x ^{4} + 6}{3 - 4 x ^{- 4}})