Question 12897
functions is an easy topic, honestly. It is just like "normal" equations, but the words are more professional, that is all.


f(x) = {{{x^3}}}, domain is x=(-3,0,1.2,5)


this is just like {{{y=x^3}}}. It tells you the values you are allowed to put into the equation, namely the domain. So put each into the equation, as follows:


1. f(-3) = {{{(-3)^3}}}
f(-3) = -27


now repeat for each of the domain values.


NOTE: the f(-3) bit just tells you what value of x you have...it has nothing to do with the calculation: just think of it as "y" in {{{y=x^3}}}.


jon.