What is the range of 9/(x^2) ?

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

range of 9/(x^2)

range

\frac{9}{x ^{2}}

f (x) > 0

Interval Notation

(0, \infty)

Solution steps

Rewrite as

\frac{9}{x ^{2}} = y

Multiply both sides by

x^{2}

9 = y x^{2}

The range is the set of y for which the discriminant is greater or equal to zero

Discriminant

9 = y x^{2} : 36 y

36 y \geq 0 : y \geq 0

Check if the range interval endpoints are included

y = 0 :

Excluded

Therefore the range is

f (x) > 0

e x + 4

f (x) = \frac{( x + 17 )}{x - 16}

- 5 y = 15

f (x) = e^{\frac{1}{x}}

(5, - 1), (6, - 6)