I'm preparing for a test tomorrow and need help figuring out how to do these kinds of problems

Question

It looks like this

f(t) = t^3 - 5t

g(t) = 2t + 3

Find ( h • g ) ( a )

How would I do this? I have a test coming up tomorrow and I need to figure these out

Answer 1

It makes a big difference if that is a dot or a circle between the functions. I also need to assume that you typed an h in place of an f, since there is no function h given.

if you have f dot g it is multiplication which gives you,

(a^3 - 5a)(2a + 3) = 2a^4 + 3a^3 - 10a^2 - 15a

Patti D.