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The number of people taking the bus at price p dollars per ticket is given by x=5000(5-p)^1/2.

For what value of P is the demand unitary?

  • Calculus - ,

    "Unitary demand" occurs where p*x = constant, which also implies that
    dp/p = -dx/x,
    which is another way of saying
    dx/dp = -x/p

    In your case
    dx/dp = -5000*(1/2)/(5-p)^1/2
    = -2500/(5-p)^1/2
    = -x/p = -5000*(5-p)^1/2*(1/p)

    1 = 2*(5-p)/p
    p = 10 - 2p
    p = $3.33

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