Finding Domain and Range with absolute value under radical  TOPIC_SOLVED

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Finding Domain and Range with absolute value under radical

Postby Arsalaan on Sun Sep 27, 2009 10:17 pm

So these questions have an absolute value of x under the sqrt so i don't know how to do it.

1. a) y=3x^2 +1 / 5x^2 - 25

Is the domain all real number except 5 and range all real number except 0?

b). y= sqrt 2|x|-4 - all of it is under sqrt. Find Domain and Range

2. Find if function is even odd or neither

a) x^2 -x
b) 1+x^2 / |x|
c) x + sqrt x
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Postby stapel_eliz on Sun Sep 27, 2009 11:42 pm

Arsalaan wrote:So these questions have an absolute value of x under the sqrt so i don't know how to do it.

1. a) y=3x^2 +1 / 5x^2 - 25

I'm not seeing any square root or absolute values...? Also, what you have typed means the following:

. . . . .

...but I have a feeling that this isn't what you meant...?

Please review how to format math and reply with clarifications. Thank you! :D

Arsalaan wrote:b). y= sqrt 2|x|-4 - all of it is under sqrt. Find Domain and Range

I think you mean the following:

. . . . .

To find the domain, determine the x-values for which the argument of the radical is non-negative. To find the range, graphing is a great way to start.... :wink:

Arsalaan wrote:2. Find if function is even odd or neither

a) x^2 -x
b) 1+x^2 / |x|
c) x + sqrt x

To learn how to determine if a function is even, odd, or neither, try here. :idea:
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