anonymous
  • anonymous
If f(x) = xsquared does f(a+1) = (a+1)squared
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
what's the question?
anonymous
  • anonymous
if f(x) = X squared does it follow that f(a+1) = (a+1) squared
anonymous
  • anonymous
True :D

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anonymous
  • anonymous
yes
anonymous
  • anonymous
explain why
anonymous
  • anonymous
replace x with (a+1).
anonymous
  • anonymous
How do you evaluate the expresssion f(g(4)) when f(x)= 3x and g(x)= x-2
anonymous
  • anonymous
f(g(4))=3(4-2)=6
hba
  • hba
@firebird Do you understand ?
anonymous
  • anonymous
no
hba
  • hba
So let me explain that to you We have to find f(g(4) So we have to find g(4) first g(x)=x-2 then g(4)=
anonymous
  • anonymous
note: if f(x)=3x, g(x)=x-2, then f(g(x))=3(g(x))=3(x-2)
anonymous
  • anonymous
f(g(x)) :substitute g(x) in x of f(x).
anonymous
  • anonymous
simply sub anything inside x as long it's in the domain.
hba
  • hba
@firebird Do you follow me ?
anonymous
  • anonymous
yes
hba
  • hba
So what did you get ? g(4)=
anonymous
  • anonymous
4-2=g(x)
anonymous
  • anonymous
So under the same values of f(x) and g(x), g(f(4)) is equal to g(3(x)) which is equal to x-2(3x)?

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