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(Px – 20) (100 – 2 Px + Pyg)

Differentiating with respect to P we get

100 – 4Px + Pyg + 40 = 0

I don't understand how this is calc... whenever I multiply through and take the deriv I get another answer. Do you first multiply Px through then 20??

  • math -

    Pyg will be treated as a constant.

    It doesn'matter how you multiply it out.



  • math -

    How do the 2000 and 20pyg cancel out...the first pyg is still there?

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