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December 19, 2014

December 19, 2014

Posted by **Ed** on Thursday, September 23, 2010 at 5:23pm.

My Answer:

sqr(x+1)/sqr( x-1)

sqr(x^2-1)/ (x-1)

However, I also have to state the restrictions to the domain and range, which I do not know how to do. Could someone please help me? Thanks.

- Math -
**Reiny**, Thursday, September 23, 2010 at 6:42pmyour answer is correct.

for the restriction, the denominator cannot be zero, so x≠1

also the inside of the square root cannot be negative,

this will happen when -1 ≤ x ≤ +1

so the domain is x ≤ -1 OR x > 1

as x gets +large, the expression approaches 1

as x gets -large, the expression approaches -1

range: y >1 OR y < -1

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