I'm trying to do my Maths assignment, I looked at the lecturer's notes for examples but it seems like at lot of steps at skipped. Are is the example:
pic http://gyazo.com/d5e86e8598726d2c5be2a28578deaeeb.png?1351682833
I understand what Injective and Surjective functions are by watching this video:
http://www.youtube.com/watch?v=xKNX8BUWR0g
But I'm still not able to do my assignment, which is this:
http://gyazo.com/f6441e550637aa9fe15a40779405d989.png?1351682990
So far I have this:
For $f[0,4], x^3:$
$f(0) = 0^3 = 0$
$f(1) = 1^3 = 1$
$f(2) = 2^3 = 8$
$f(4) = 4^3 = 64$
For $f[0,4], x + 6:$
$f(0) = 0 + 6 = 6$
$f(1) = 1 + 6 = 7$
$f(2) = 2 + 6 = 8$
$f(3) = 3 + 6 = 9$
$f(4) = 4 + 6 = 10$
I'm not sure what do to next.
Thank you.