[C3] Differentiation Question

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  1. StylaBoy's Avatar
    1 01-04-2012  11:09
    • Exalted Member
    • Posts: 284
    [C3] Differentiation Question
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    What happened to the 15 x and where is the power 5 gone? :confused:

    15x belongs to the first bracket bit right? Because between them, there is an invisible times sign..?
  2. TheMagicMan's Avatar
    2 01-04-2012  11:18
    • Overlord in Training
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    Re: [C3] Differentiation Question
    (Original post by StylaBoy)
    Spoiler:
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    Click image for larger version.  Name: mafs-2.png  Views: 32  Size: 77.2 KB  ID: 139151


    What happened to the 15 x and where is the power 5 gone? :confused:

    15x belongs to the first bracket bit right? Because between them, there is an invisible times sign..?
    The 15x comes from the first part. What they are doing is saying (1+3x)^5=(1+3x)(1+3x)^4 and then taking out a common factor of (1+3x)^4
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  3. TenOfThem's Avatar
    3 01-04-2012  11:20
    • TSR Royalty
    Re: [C3] Differentiation Question
    15x(1+3x)^4 + (1+3x)^5

    15x(1+3x)^4 + (1+3x)(1+3x)^4


    Then the common factor is taken out


    tooooooooooo slow :rolleyes:
  4. StylaBoy's Avatar
    4 01-04-2012  11:52
    • Exalted Member
    • Posts: 284
    Re: [C3] Differentiation Question
    oohh, that one was too tricky for me -.- thx guys:woo:
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