+0  
 
0
271
1
avatar+253 

Find the domain of the function.

g( x) = log 3( x 2 −  9)
g( x) = ln( x −  x 2)
h(x) = ln x + ln( 1 − x)
f( x) = log 5( 6 −  3 x)
sally1  Jul 9, 2014

Best Answer 

 #1
avatar+91435 
+5

 

I'll just do the first one for you.

$$\\g(x) = log_3( x^2-9)\\\\
x^2-9>0\qquad \qquad \mbox{because you can only find the log of a positive number}\\\\
x^2>9\\\\
x<-3 \:\:or\:\: x>3$$

Check with a graph.

Melody  Jul 13, 2014
Sort: 

1+0 Answers

 #1
avatar+91435 
+5
Best Answer

 

I'll just do the first one for you.

$$\\g(x) = log_3( x^2-9)\\\\
x^2-9>0\qquad \qquad \mbox{because you can only find the log of a positive number}\\\\
x^2>9\\\\
x<-3 \:\:or\:\: x>3$$

Check with a graph.

Melody  Jul 13, 2014

6 Online Users

avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details