Math

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Given that f(x)= 2x-5 and g(x) =x^2-31, calculate the value of

1)f(-2)= 2(-2)-5 = -1 is this correct?

2) gf(1)= 1-31 = -30 is this correct?

3)f indirect 1(3) how do i do this one?

  • Math -

    1) f(-2) = 2(-2) - 5
    = -4 - 5
    = -9

    2) you found g(1)
    if by gf(1) you mean g(f(1))
    then
    g(f(1)) = g(2-5))
    = g(-3)
    = (-3)^2 - 31
    = 9 - 31
    = -22

    3) I don't a clue what you mean by
    "f indirect 1(3)"
    I have never seen that notation.

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