Marginal Revenue and Profit - H-SC
Marginal Revenue and Profit
Lecture 21 Section 2.5
Robb T. Koether
Hampden-Sydney College
Fri, Feb 24, 2017
Robb T. Koether (Hampden-Sydney College)
Marginal Revenue and Profit
Fri, Feb 24, 2017 1 / 6
Objectives
Objectives
Use derivatives to approximate increments. Study marginal revenue and marginal profit.
Robb T. Koether (Hampden-Sydney College)
Marginal Revenue and Profit
Fri, Feb 24, 2017 2 / 6
Approximations
Approximations
Let f (x) be a function. If x is small relative to x, then f f (x)x.
Robb T. Koether (Hampden-Sydney College)
Marginal Revenue and Profit
Fri, Feb 24, 2017 3 / 6
Marginal Revenue and Profit
Definition (Marginal Revenue)
Let R(x) represent the revenue received from selling x units of a commodity. The marginal revenue of selling x units is R (x).
Definition (Marginal Profit)
Let P(x) represent the cost of producing x units of a commodity. The marginal cost of producing x units is P (x).
Robb T. Koether (Hampden-Sydney College)
Marginal Revenue and Profit
Fri, Feb 24, 2017 4 / 6
Example 2.5.1
Example 2.5.1
A manufacturer estimates that when x units of a particular commodity
are
produced,
the
total
cost
will
be
C (x )
=
1 8
x
2
+
3x
+
98
dollars,
and
furthermore, that all x units will be sold when the price is
p(x )
=
1 3
(75
-
x)
dollars
per
unit.
Robb T. Koether (Hampden-Sydney College)
Marginal Revenue and Profit
Fri, Feb 24, 2017 5 / 6
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