NCERT Solutions for Class 12-science Maths Chapter 3 - Matrices
Chapter 3 - Matrices Exercise Ex. 3.1



Let A =
(i)
a11 = ,
a12 = ,
a21 = ,
a22 =
Therefore, A =
(ii)
a11 = ,
a12 = ,
a21 = ,
a22 =
Therefore, A =
(iii)
a11 = ,
a12 = ,
a21 = ,
a22 =
Therefore, A = .





Chapter 3 - Matrices Exercise Ex. 3.2



(i)
ii)
iii)
iv)
v)
vi)





















Chapter 3 - Matrices Exercise Ex. 3.3






Chapter 3 - Matrices Exercise Ex. 3.4







Let A =
Now, det(A)=|A|=6-4=2≠0
Therefore, inverse of A exist.
We know that, A=AI
….. (C2→C2+
C1)
….. (C1→C1+6C2)
….. (C1→
C1)
….. (C2→
C2)










Chapter 3 - Matrices Exercise Misc. Ex.









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