Charles and Bernice (“Ray") Eames were American designers who made major contributions to modern architecture and furniture design. Suppose that a manufacturer wants to make an Eames elliptical coffee table 90 in. long and 30 in . wide out of an 8 -ft by 4 -ft piece of birch plywood. If the center of a piece of plywood is positioned 0 , 0 , determine the distance from the center at which the foci should be located to draw the ellipse.
Charles and Bernice (“Ray") Eames were American designers who made major contributions to modern architecture and furniture design. Suppose that a manufacturer wants to make an Eames elliptical coffee table 90 in. long and 30 in . wide out of an 8 -ft by 4 -ft piece of birch plywood. If the center of a piece of plywood is positioned 0 , 0 , determine the distance from the center at which the foci should be located to draw the ellipse.
Solution Summary: The author calculates the distance from the centre at which the foci of the elliptical coffee table should be located.
Charles and Bernice (“Ray") Eames were American designers who made major contributions to modern architecture and furniture design. Suppose that a manufacturer wants to make an Eames elliptical coffee table
90
in. long and
30
in
.
wide out of an
8
-ft
by
4
-ft
piece of birch plywood. If the center of a piece of plywood is positioned
0
,
0
, determine the distance from the center at which the foci should be located to draw the ellipse.
A factorization A = PDP 1 is not unique. For A=
7 2
-4 1
1
1
5 0
2
1
one factorization is P =
D=
and P-1
30
=
Use this information with D₁
=
to find a matrix P₁ such that
-
-1 -2
0 3
1
-
- 1
05
A-P,D,P
P1
(Type an integer or simplified fraction for each matrix element.)
Matrix A is factored in the form PDP 1. Use the Diagonalization Theorem to find the eigenvalues of A and a basis for each eigenspace.
30 -1
-
1 0 -1
400
0
0 1
A=
3 4 3
0 1 3
040
3 1 3
0 0
4
1
0
0
003
-1 0 -1
Select the correct choice below and fill in the answer boxes to complete your choice.
(Use a comma to separate vectors as needed.)
A basis for the corresponding eigenspace is {
A. There is one distinct eigenvalue, λ =
B. In ascending order, the two distinct eigenvalues are λ₁
...
=
and 2
=
Bases for the corresponding eigenspaces are {
and ( ), respectively.
C. In ascending order, the three distinct eigenvalues are λ₁ =
=
12/2
=
and 3 = Bases for the corresponding eigenspaces are
{}, }, and {
respectively.
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