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人気のある微分積分 >

limit as x approaches 0+of 7(cot(x)-1/x)

解

x \to 0 + lim (7 (cot (x) - \frac{1}{x}))

解

0

解答ステップ

x \to 0 + lim (7 (cot (x) - \frac{1}{x}))

x \to a lim [c \cdot f (x)] = c \cdot x \to a lim f (x)

= 7 \cdot x \to 0 + lim (cot (x) - \frac{1}{x})

サイン, コサインで表わす

= 7 \cdot x \to 0 + lim (\frac{cos ( x )}{sin ( x )} - \frac{1}{x})

簡素化

\frac{cos ( x )}{sin ( x )} - \frac{1}{x} : \frac{x cos ( x ) - sin ( x )}{x sin ( x )}

= 7 \cdot x \to 0 + lim (\frac{x cos ( x ) - sin ( x )}{x sin ( x )})

ロピタルの定理を適用する

= 7 \cdot x \to 0 + lim (\frac{- x sin ( x )}{sin ( x ) + x cos ( x )})

ロピタルの定理を適用する

= 7 \cdot x \to 0 + lim (\frac{- sin ( x ) - x cos ( x )}{2 cos ( x ) - x sin ( x )})

値を挿入する

x = 0

= 7 \cdot \frac{- sin ( 0 ) - 0 \cdot cos ( 0 )}{2 cos ( 0 ) - 0 \cdot sin ( 0 )}

簡素化

7 \cdot \frac{- sin ( 0 ) - 0 \cdot cos ( 0 )}{2 cos ( 0 ) - 0 \cdot sin ( 0 )} : 0

= 0

グラフ

人気の例

limit as x approaches 0+of ln(1)-ln(x)

x \to 0 + lim (ln (1) - ln (x))

limit as x approaches 0+of b(0)^2+ab

x \to 0 + lim (b (0)^{2} + ab)

limit as x approaches 3 of sqrt(x-[x])

x \to 3 lim (x - [x])

limit as x approaches-3 of sqrt(1-5x)

x \to - 3 lim (1 - 5 x)

limit as x approaches 0 of 1-cos(1/x)

x \to 0 lim (1 - cos (\frac{1}{x}))