Deriving the equation of an ellipse centered at the origin
Let
and
be the
foci of a hyperbola centered at the origin. The hyperbola is the set of all points
such that the difference of the distances from
to the foci is constant. See
[link] .
If
is a vertex of the hyperbola, the distance from
to
is
The distance from
to
is
The sum of the distances from the foci to the vertex is
If
is a point on the hyperbola, we can define the following variables:
By definition of a hyperbola,
is constant for any point
on the hyperbola. We know that the difference of these distances is
for the vertex
It follows that
for any point on the hyperbola. As with the derivation of the equation of an ellipse, we will begin by applying the
distance formula . The rest of the derivation is algebraic. Compare this derivation with the one from the previous section for ellipses.
This equation defines a hyperbola centered at the origin with vertices
and co-vertices
Standard forms of the equation of a hyperbola with center (0,0)
The standard form of the equation of a hyperbola with center
and transverse axis on the
x -axis is
Note that the vertices, co-vertices, and foci are related by the equation
When we are given the equation of a hyperbola, we can use this relationship to identify its vertices and foci.
Questions & Answers
Ayele, K., 2003. Introductory Economics, 3rd ed., Addis Ababa.
what's the difference between a firm and an industry
Abdul
firm is the unit which transform inputs to output where as industry contain combination of firms with similar production 😅😅
Abdulraufu
Suppose the demand function that a firm faces shifted from
Qd 120 3P
to
Qd 90 3P
and the supply function has shifted from
QS
20 2P
to
QS
10 2P .
a) Find the effect of this change on price and quantity.
b) Which of the changes in demand and supply is higher?
Demand curve shows that how supply and others conditions affect on demand of a particular thing and what percent demand increase whith increase of supply of goods
Israr
Hi Sir please how do u calculate Cross elastic demand and income elastic demand?
Abari
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