Question

explain

f(x) = 4x + 7, g(x) = 3x2

Find (f + g)(x).

Answer 1

(f + g)(x).
it just means
f(x)+g(x)

Answer 2

4x + 7+3x^2

rearrange

3x^2+4x+7

Answer 3

f(x) = 7x + 7, g(x) = 6x2

Find (fg)(x).
how about this example^^

how do I write it

Answer 4

f(x)*g(x)

Answer 5

(7x + 7)*( 6x^2)

expand it

Answer 6

42*x^3+42*x^2

Answer 7

like this 42x^3 + 42x^2

Answer 8

Find (fg)(x). Is that exactly how it appears in your book?

Answer 9

yes

Answer 10

because it could be a composite function which is f o g (x)

Answer 11

i think its 42x^3 + 42x^2

Answer 12

in that case if it is composite then it is f((g(x))

Answer 13

no it is composite hold on in that case it is

Answer 14

f(x) = 7x + 7, g(x) = 6x2

7(6x^2) + 7

Answer 15

7(6x^2) + 7

42x^2+7

Answer 16

42x^2 + 42x
6x^2 + 7x + 7
42x + 42
42x^3 + 42x2

Answer 17

42x^2+7 final answer

Answer 18

thats not one of the answer chocies