# Math Help - how to know the function is 1-1 and onto.

1. ## how to know the function is 1-1 and onto.

$f(x)=6^x+6^{|x|}$

2. ## Re: how to know the function is 1-1 and onto.

Originally Posted by saravananbs
$f(x)=6^x+6^{|x|}$
We need to know the initial and final sets.

3. ## Re: how to know the function is 1-1 and onto.

You could try sketching it, take some limits maybe?