To solve this problem, we need to perform the following steps:
(a) To find the transition matrix from B to B′, express each vector in B as a linear combination of the vectors in B′. The coefficients of these combinations form the columns of the transition matrix.
(b) To find the transition matrix from B′ to B, express each vector in B′ as a linear combination of the vectors in B. The coefficients of these combinations form the columns of the transition matrix.
(c) Verify that the two transition matrices are inverses by multiplying them and checking if the result is the identity matrix.
(d) To find the coordinate matrix [x]B, use the transition matrix from B′ to B and multiply it by [x]B′.
We have the basis vectors:
B={(1,3),(−2,−2)},B′={(−12,0),(−4,4)}
The transition matrix from B to B′ is given by:
TB→B′=[−0.0833−0.5833−0.25−0.75]
The transition matrix from B′ to B is:
TB′→B=[9−7−31]
To verify that the two transition matrices are inverses, we check:
TB→B′⋅TB′→B=I
where I is the identity matrix:
I=[1001]
The result confirms that TB→B′ and TB′→B are indeed inverses, as are_inverses=True.
Given the coordinate matrix [x]B′=[−13], we find:
[x]B=TB′→B⋅[x]B′=[−1810]
The transition matrices and coordinate matrix are:
- Transition matrix from B to B′:
TB→B′=[−0.0833−0.5833−0.25−0.75]
- Transition matrix from B′ to B:
TB′→B=[9−7−31]
- Coordinate matrix [x]B:
[x]B=[−1810]