QUESTION
Find matrices A and B, if 2A – B =
SOLUTION
Given equations are
2A – B =
and A – 2B =
By (i) – (ii) x 2, we get
3B =
=
=
∴ 3B =
∴ B =
∴ B =
By (i) x 2 – (ii), we get
3A =
=
=
∴ 3A =
∴ A =
∴ A =
Find matrices A and B, if 2A – B =
Given equations are
2A – B =
and A – 2B =
By (i) – (ii) x 2, we get
3B =
=
=
∴ 3B =
∴ B =
∴ B =
By (i) x 2 – (ii), we get
3A =
=
=
∴ 3A =
∴ A =
∴ A =