Question

suppose that the functions Q and R are defined as follows q(x)=x^2+7 and r(x)=sqrt x+8 find the following. (q*r)(1)=? (r*q)(1)=?

Answer 1

Find what?

Answer 2

this was everything the problem said, I am so completely confused with these functions

Answer 3

First you must understand notations. I tried showing them last time.

Answer 4

First what does (q*r)(x) mean? it means multiply q(x) and r(x) together. Finally (q*r)(1) means evaluate q times r at 1.

Answer 5

okay

Answer 6

so do I say (x^2+7*sqrt x+8)(1)?

Answer 7

Yes. But 1 is not needed right now.

Answer 8

okay and switch it around for (r*q)?

Answer 9

We will deal with it soon. Just multiply r and q now and show me your answer.

Answer 10

I can guess the answer but Im going to be honest, I have no idea

Answer 11

rq(x)=sqrt x+8

Answer 12

70 and 16?