q(x)= x^2 + 3 r(x)= radical sign (x +2)

Question

(r • q)(2) =

(q • r)(2) =

It’s finding the composition of two functions.

Answer 1

These problems are easier if they give you a number to put into the function like this one did.

q(2) = 2² + 3 = 7

r(2) = √(2 + 2 = √ 4 = 2

Then q ( r (2) ) = q ( 2 ) = 7 plug 2 into the r function first, then plug that answer into the q function

r ( q ( 2 ) ) = r ( 7 ) = √ ( 7 + 2 ) = √ 9 = 3 plug 2 into the q function first, then plug that answer into the

r function.