Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Just subtract for finding (f  g) and add for finding (f + g).
 one year ago

tjones89 Group TitleBest ResponseYou've already chosen the best response.0
(fg)(x) = f(x)  g(x)
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
\[\rm (f  g)(x) = (2x  2)(x + 4)\]\[\rm (f + g)(x) = (2x + 2) + (x + 4)\]
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Oh, then it gets a little difficult... you have to plug g(x) into f(x).
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
For example, if you got \(\rm f(x) = x^2\) and \(\rm g(x) = x+1\), then\[\rm f(g(x)) = f(x + 1) = (x + 1)^2\]
 one year ago

coolaidd Group TitleBest ResponseYou've already chosen the best response.0
oh..ok :/
 one year ago

coolaidd Group TitleBest ResponseYou've already chosen the best response.0
soo what would this be?
 one year ago

bluebrandon Group TitleBest ResponseYou've already chosen the best response.0
for f(g(x)) just replace all the x in 2x2 with (x+4) and for g(f(x)) just replace all the x in x+4 with (2x2)
 one year ago

jiteshmeghwal9 Group TitleBest ResponseYou've already chosen the best response.0
\(x(fg)\)=\(f(x)g(x)\) now put the values of \(f(x)\) & \(g(x)\) & solve them.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.0
yup.. thats how its done.
 one year ago

coolaidd Group TitleBest ResponseYou've already chosen the best response.0
so would it then be 2x+82 8x8?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.0
how u got 8x8?
 one year ago

coolaidd Group TitleBest ResponseYou've already chosen the best response.0
2x times +4 and2 times +4
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.0
noooo... (2x2) +4 u have to just open the bracket.. if there is a positive or negative sign outside the bracket that means its addint or subtracting not multiplying. your expression will be like 2x2 +4
 one year ago

coolaidd Group TitleBest ResponseYou've already chosen the best response.0
so it would just be 2x2 +4? i dont have to solve it?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.0
(2x2)4 if it was written liek this then u had to multiplied.. and yes that would be your answer just simplify it 2x+2 would be your answer for gf(x)
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.