anonymous
  • anonymous
More with functions: QUICK QUESTION Which of the equations do I do first? G or F? For example: If f(x)=x+4, g(x)=5x-1 what is f + g of -3? I know how to do the equation but I don't know which one I should substitute -3 for x
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
\[(f+g)(-3)=f(-3)+g(-3)\]
anonymous
  • anonymous
so f first right?
anonymous
  • anonymous
is it always going to be f first?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
because one of the equations I tried said what is g of f of -1 and I had to do F first
anonymous
  • anonymous
guys please help :(
jdoe0001
  • jdoe0001
hmm, is an addition, the order in whiich the sum will be conducted won't matter
austinL
  • austinL
It really doesn't matter which one you do first for this particular problem.
jdoe0001
  • jdoe0001
2+ 3 = 5 3 + 2 = 5 x + 3x = 4x 3x + x = 4x
anonymous
  • anonymous
okay if its addition it doesn't matter what if its multiplication?
jdoe0001
  • jdoe0001
on multiplication, it won't matter, if you end up doing f(x) * g(x) same, the order doesn't matter in multiplication
anonymous
  • anonymous
but I tried one that said f of g of 2 im guessing it was multiplication and i did it both ways and I got two different answers
jdoe0001
  • jdoe0001
hehe, w00t, same 2 functions?
austinL
  • austinL
\(f(g(2))\)?
austinL
  • austinL
You first calculate g(2), and then you plug that value in for x in f(x).
anonymous
  • anonymous
hmm yeah like that austin
jdoe0001
  • jdoe0001
ohhh, that's not multiplication then
anonymous
  • anonymous
yeah thats what I did but how did you know you do g first?
anonymous
  • anonymous
oohhhh is it because its in parantheses?
jdoe0001
  • jdoe0001
because is g(2) is the DOMAIN of f(x), so you evaluate g(2) first, so you can pass it to f(x)
anonymous
  • anonymous
what do you mean domain?
austinL
  • austinL
You have \(f(x)\) and \(g(x)\) If you have \(f(g(x))\), that means that you would plug in \(g(x)\) for all instances of x in \(f(x)\). BUT because in your problem, it is \(g(2)\), that means that you have to plug in 2 for all instances of x in \(g(x)\). Then you plug that value into \(f(x)\).
anonymous
  • anonymous
I get that plug in part and how to get the answer I just don't know which one to do first wether its f first or g first
jdoe0001
  • jdoe0001
\(\bf f(x) = x^4 + x^3 + x^2...\\ g(x) = whatever\\ f(g(x)) = (whatever)^4 + (whatever)^3 + (whatever)^2 ...\)
austinL
  • austinL
Find \(f(g(3))\) \(f(x)=2x+3\) \(g(x)=5x-2\) \(g(3)=5(3)-2=13\) \(f(g(3))=2(13)+3=29\)
anonymous
  • anonymous
Ii understand how to do that guys its just I don't know which to plug in FIRST
anonymous
  • anonymous
okay lets say it said g(f(3) I would plug in 3 into f first right?
austinL
  • austinL
If it is \(f(g(\text{insert number here}))\) You calculate \(g(\text{insert number here})\) first, then you plug that into the greater value.
anonymous
  • anonymous
ohh okay I think I get it...was i right about what I said before?
austinL
  • austinL
Mindless__Unique: okay lets say it said g(f(3) I would plug in 3 into f first right? This?
anonymous
  • anonymous
yes
austinL
  • austinL
Yes, you would plug 3 into f(x) first.
anonymous
  • anonymous
Okay I got it now :D THANKS SO MUCH YOU GUYS YOU SAVED MY retrice
austinL
  • austinL
Watch the language lol.
anonymous
  • anonymous
How do I give you guys your medals?
anonymous
  • anonymous
lol opps
austinL
  • austinL
well, you can only give one. I can give one to whoever.
anonymous
  • anonymous
Thanks again guys
austinL
  • austinL
No problemo.

Looking for something else?

Not the answer you are looking for? Search for more explanations.