(1) Find the order of the product matrix AB if
(2) If A is of order p x q and B is of order q x r what is the order of AB and BA? Solution
(3) A has ‘a’ rows and ‘a + 3 ’ columns. B has ‘b’ rows and ‘17–b’ columns, and if both products AB and BA exist, find a, b? Solution
(4) If
find AB, BA and check if AB = BA? Solution
(5) Given that
verify that A(B + C) = AB + AC . Solution
(6) Show that the matrices
satisfy commutative property AB = BA Solution
(7)
Show that (i) A(BC) = (AB)C
(ii) (A−B)C = AC −BC (iii) (A−B)T = AT −BT Solution
(8) If
then show that A2 +B2 = I . Solution
(9) If A =
prove that AAT = I . Solution
(10) Verify that A2 = I when
(11)
(12)
verify that (AB)T = BTAT Solution
(13)
show that A2 - 5A + 7I2 = 0 Solution
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