定义域 f(x)= x/(x^2)

解答

定义域

f (x) = \frac{x}{x ^{2}}

x < 0 or x > 0

间隔符号

(- \infty, 0) \cup (0, \infty)

求解步骤

找到无定义的点（奇点）:

x = 0

函数定义域

x < 0 or x > 0

d o main f (x) = 2 x + 5 + x + 2

in v erse f (x) = \frac{( x - 7 )}{( x + 7 )}

r an g e \frac{1}{5} x^{3} - 4

p er p e n d i c u l a r y = 2 x + 7, (4, - 8)

r an g e f (x) = - \frac{1}{2} ∣ x - 6 ∣ + 1