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(Solved): Use the following parts to find A^(7), where A=[[-6,18],[6,6]]. (a) (1 point) Given the eigenvalues ...



Use the following parts to find

A^(7)

, where

A=[[-6,18],[6,6]]

. (a) (1 point) Given the eigenvalues are

\lambda _(1)=12

and

\lambda _(2)=-12

with corresponding eigenvectors

v_(1)=[[1],[1]]

and

v_(1)=[[-3],[1]]

, find the invertible matrix

P

to diagonalize

A

, i.e.,

A=PDP^(-1)

.

P=

(b) (1 point) Find

P^(-1)

.

P^(-1)=

(c) (1 point) Write the diagonal matrix

D

.

D=

(d) (2 points) Derive a general formula involving

k

for

A^(k)

using the fact that

A=PDP^(-1)

. Start from

A^(2)

, then

A^(3)

, to generate

A^(k)

. HINT: Only work in variables

PDP^(-1)

for

A^(2)

and

A^(3)

. WORK:

A^(2)= A^(3)= A^(k)=

(e) (2 points) Find

A^(7)

(Do not multiply

A

by itself 7 times. This will earn 0 points).

A^(7)=
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