Kindly Consider the following
46. 
Kindly Consider the following
46.
Given, A=
we have, A2 = A?A =
Hence, A2 – 5A+71=
Now, A2 – 5A+7I=0.
A?A – 5A= –7I.
A A(A–1)–5(AA–1)= –7I(A–1) (Multiplying by A-1on both sides)
AI – 5I= –7A–1
7A–1= –(AI – 5I)
A–1=
=
=
A–1=
Similar Questions for you
|2A| = 27
8|A| = 27
Now |A| = α2–β2 = 24
α2 = 16 + β2
α2– β2 = 16
(α–β) (α+β) = 16
->α + β = 8 and
α – β = 2
->α = 5 and β = 3
|A| = 3
|B| = 1
->|C| = |ABAT| = |A|B|A7| = |A|2|B|
= 9
->|X| = |A|C|2|AT|
= 3 * 92 * 3 = 9 * 92 = 729
|A| = 2
&nb
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else.
On Shiksha, get access to
Learn more about...

Maths Ncert Solutions class 12th 2026
View Exam DetailsMost viewed information
SummaryDidn't find the answer you were looking for?
Search from Shiksha's 1 lakh+ Topics
Ask Current Students, Alumni & our Experts
Have a question related to your career & education?
See what others like you are asking & answering