what if the radical is in the denominator?

the domain is

so the domain is

??

range: ??

is this correct?

Printable View

- Mar 23rd 2009, 08:26 AMprincess_21functions involving radical
what if the radical is in the denominator?

the domain is

so the domain is

??

range: ??

is this correct? - Mar 23rd 2009, 08:58 AMu2_wa
First check where

Solution is and

This means as domain is so the equation is always positive.

This means if ,**y=**

As always increases when increases, So the value of this function decreases.

Hence max. value this function can have is and the graph of this function tends to zero, when x increases but can never be equal to zero.

Range : - Mar 23rd 2009, 09:07 AMprincess_21
- Mar 23rd 2009, 11:05 AMstapel
The poster

**solved the quadratic equation**.

You can, for instance, use the**Quadratic Formula**for this.... (Wink) - Mar 24th 2009, 02:34 AMu2_wa