132k views
4 votes
(HELP PLEASE) if f(x)=x/3-2 and g(x)=3x^2+2x-6 , find (f+g)(x)

(HELP PLEASE) if f(x)=x/3-2 and g(x)=3x^2+2x-6 , find (f+g)(x)-example-1

2 Answers

5 votes
Identify and sum up the x^2 terms: Result: 3x^2
Next, ident. and sum up the x terms: Result: (1/3 + 2) = (7/3)x
Last, ident. and sum up the const. terms: Result: -2 - 6 = -8

The sum of these two functions is 3x^2 + (7/3)x - 8.
User Sergio Prado
by
8.0k points
6 votes

Answer:

(A)

Explanation:

The given functions are:


f(x)=(x)/(3)-2 and
g(x)=3x^2+2x-6

Now,
(f+g)(x)=f(x)+g(x)

therefore,
(f+g)(x)=(x)/(3)-2+3x^2+2x-6

=
3x^2+2x+(x)/(3)-8

=
(9x^2+6x+x-24)/(3)

=
(9x^2+7x-24)/(3)

=
3x^2+(7)/(3)x-8

Thus,
(f+g)(x)=3x^2+(7)/(3)x-8

Hence, Option A is correct.

User Matthew Trent
by
8.2k points

No related questions found