limit as x approaches+7 of 3/(x-7)

解答

x \to + 7 lim (\frac{3}{x - 7})

发散

求解步骤

x \to 7 lim (\frac{3}{x - 7})

若

x \to a^{-} lim f (x) \neq = x \to a^{+} lim f (x)

则极限不存在

x \to 7 + lim (\frac{3}{x - 7}) = \infty

x \to 7 - lim (\frac{3}{x - 7}) = - \infty

= 发散

\int (\frac{t ^{3} - 8 t + 1}{( 2 t ) ^{4}}) d t

y^{^{''}} + 36 y = sin (6 t)

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

a re a sin (x) cos^{2} (x), 4 - 4 x, 0.69275, 0.92811

\frac{d y}{d x} + \frac{3 y}{x} + 2 = 3 x, y (1) = 1