Question

if f(a) = a-2 and F(a,b) = b^2 + a, then F(3, f(4)) is ?

Answer 1

Ok so at first you should find f(4) using f(a) = a-2. post your result and I will help you through it

Answer 2

so is f(4) = 2

Answer 3

yes, Now using F(a,b) = b^2; if we want to find F(3,f(4)). what shall we do?

Answer 4

isn't F(a,b) = b^2 + a

Answer 5

my bad. that doesn't make a big difference though, use the value we found out in f(4) as b, square it and add it with a (which is 3). that's it

Answer 6

thank so much. i finally know how to it.

Answer 7

no problem