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firebird

If f(x) = xsquared does f(a+1) = (a+1)squared

  • one year ago
  • one year ago

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  1. ASAAD123
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    what's the question?

    • one year ago
  2. firebird
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    if f(x) = X squared does it follow that f(a+1) = (a+1) squared

    • one year ago
  3. mark_o.
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    True :D

    • one year ago
  4. ASAAD123
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    yes

    • one year ago
  5. firebird
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    explain why

    • one year ago
  6. ASAAD123
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    replace x with (a+1).

    • one year ago
  7. firebird
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    How do you evaluate the expresssion f(g(4)) when f(x)= 3x and g(x)= x-2

    • one year ago
  8. ASAAD123
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    f(g(4))=3(4-2)=6

    • one year ago
  9. hba
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    @firebird Do you understand ?

    • one year ago
  10. firebird
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    no

    • one year ago
  11. hba
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    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)=

    • one year ago
  12. Shadowys
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    note: if f(x)=3x, g(x)=x-2, then f(g(x))=3(g(x))=3(x-2)

    • one year ago
  13. ASAAD123
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    f(g(x)) :substitute g(x) in x of f(x).

    • one year ago
  14. Shadowys
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    simply sub anything inside x as long it's in the domain.

    • one year ago
  15. hba
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    @firebird Do you follow me ?

    • one year ago
  16. firebird
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    yes

    • one year ago
  17. hba
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    So what did you get ? g(4)=

    • one year ago
  18. firebird
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    4-2=g(x)

    • one year ago
  19. firebird
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    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)?

    • one year ago
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