Question

If f(x) = 2x + 3 and g(x) = x2 + 1,find f(g(3))

Answer 1

so first calculi g(3) = ?

Answer 2

I have no clue how to do this. I'm taking a pretest.

Answer 3

so just substitute the 3 in place of x inside g(x) = x^2 +1

Answer 4

So 3^2+1?

Answer 5

yes = ?

Answer 6

10

Answer 7

yes - so now you know that g(3) = 10 and you need to calculi f(g(3)) so what will be f(10) = ? - because g(3) = 10 - yes ?

Answer 8

would it be 2(3)+3?

Answer 9

so f(10) will get same g(3) just with difference that substitute in this case inside f(x) in place of x 10

Answer 10

23?

Answer 11

how you have got it ?

Answer 12

but yes is correct sure f(g(3)) = 2*10 +3=23

Answer 13

Okay thank you!

Answer 14

do you understand it now ?

Answer 15

Yes i do!

Answer 16

was my pleasure

anytime

good luck

bye