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Math Help - derivative ans. check

  1. #1
    Junior Member
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    derivative ans. check

    y = (x+2x)(x+1)
    ------------------
    f'(x) = 3x+6x+2


    y = 3x-1
    ------------------
    f'(y) = 3-1 = 2
    f'(y) = 2


    -thx
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  2. #2
    MHF Contributor
    Joined
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    Quote Originally Posted by maybnxtseasn View Post
    y = (x+2x)(x+1)
    ------------------
    f'(x) = 3x+6x+2


    y = 3x-1
    ------------------
    f'(y) = 3-1 = 2 the derivative of -1 is 0
    f'(y) = 2


    -thx
    First one is fine.
    Remember, the derivative of any constant is zero.
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