DOMAIN AND RANGE HELP PLEASE!!! (1 Viewer)

Lindurr · Mar 26, 2012

How do i find the domain and range of ln(x^2-5)?????

Carrotsticks · Mar 26, 2012

We know that x^2 - 5 has to be greater than 0 (can't be 0) because of the restriction on the logarithmic function.

So:

$\\ x^2 - 5 > 0 \\\\ x^2 > 5 \\\\ x > \sqrt{5} $ or $ x < - \sqrt{5}$

The range is like the normal log function, all real Y.

DOMAIN AND RANGE HELP PLEASE!!! (1 Viewer)

Lindurr

Premium Member

Carrotsticks

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