anonymous
  • anonymous
Given f(x)=2x+3 and g(x)=1/2(x-3), find the each composition. I am confuse how to set then up.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
a composition is f(g(x)) nd g(f(x)), where you substitute the whole other function for x
anonymous
  • anonymous
yeah,
anonymous
  • anonymous
you start from the inside to the outside, but i still confuse how to set them up.

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More answers

amistre64
  • amistre64
f(g(x)) = 2(g(x)) + 3
anonymous
  • anonymous
f(x)=2x+3 and g(x)=1/2(x-3), f(g(x) = 2(g(x)) + 3 f(g(x) = 2(1/2(x-3)) +3
amistre64
  • amistre64
g(f(x)) = 1/2(f(x)-3)
anonymous
  • anonymous
lol, amistre you fail
amistre64
  • amistre64
:) how so?
anonymous
  • anonymous
i just confuse, i need steps
anonymous
  • anonymous
you just write something them leave.
amistre64
  • amistre64
is there a time limt to wait around for a response? or am i allowed to come back after a response has been given? ;)
amistre64
  • amistre64
i figure with 352 medals, i might be doing something right lol
anonymous
  • anonymous
should we set one?
anonymous
  • anonymous
WB, which steps do you get? That'd be a good start
anonymous
  • anonymous
ok, so plz do step this time.
anonymous
  • anonymous
the beginning,
amistre64
  • amistre64
those are the steps; plug the one into the other; thats all there is to it.
anonymous
  • anonymous
what you plug?
amistre64
  • amistre64
f(x) = 2x+3 means that 'whatever' x equals, plug it in. f(g(x)) simply means that x = g(x)
anonymous
  • anonymous
f(x)=2x+3 and g(x)=1/2(x-3), f(g(x) = 2(g(x)) + 3 f(g(x) = 2(1/2(x-3)) +3 g(f(x)) = 1/2(f(x)-3) g(f(x)) = 1/2(2x+3)-3) then simplify by working out how to remove the parentheses
amistre64
  • amistre64
f(g(x)) = 2(g(x)) +3
anonymous
  • anonymous
ah, got it. thx tonks
anonymous
  • anonymous
all set, then I'm going to go now...jk ;)
amistre64
  • amistre64
f(w) = 2(x) + 3 f(4) = 2(4) + 3 f(applesause) = 2(applesauce) + 3 f(g(x)) = 2(g(x)) + 3 lol
amistre64
  • amistre64
...typed that lol
anonymous
  • anonymous
wait, i have a similar problem, bvut much harder.
anonymous
  • anonymous
the was just the start. and i got he answer, my prof did it on the board.
amistre64
  • amistre64
Tonks has it ;)
anonymous
  • anonymous
thx amistre
anonymous
  • anonymous
WB, post it as a new question, it is easier to find that way
anonymous
  • anonymous
f(x)=-7/2x -3 g(x)=-2x+6/7
anonymous
  • anonymous
this one is much harder.
anonymous
  • anonymous
WB, there's a new thread with this posted, check it out...

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