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

• February 29th 2012, 12:42 PM
saravananbs
how to know the function is 1-1 and onto.
$f(x)=6^x+6^{|x|}$
• February 29th 2012, 08:33 PM
FernandoRevilla
Re: how to know the function is 1-1 and onto.
Quote:

Originally Posted by saravananbs
$f(x)=6^x+6^{|x|}$

We need to know the initial and final sets.
• February 29th 2012, 11:52 PM
pickslides
Re: how to know the function is 1-1 and onto.
You could try sketching it, take some limits maybe?