Matrix Equation Element Sum (Jee Mains) | ExamDuo
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Formation, Types & Operations
Medium
Matrix Equation Element Sum
Let
A
=
[
2
a
0
1
3
1
0
5
b
]
. If
A
3
=
4
A
2
−
A
−
21
I
, where I is the identity matrix of order
3
×
3
, then
2
a
+
3
b
is equal to :
Ask about this question
SELECT ONE OPTION
A
-10
B
-13
C
-9
D
-12
Check