The Total solution for NCERT class 6-12
Compute theindicated products:
Answer - 1 : -
(i) Consider
On simplification we get,
(ii) Consider
(iii) Consider
Show that AB ≠ BAin each of the following cases:
Answer - 2 : -
(i) Consider,
Again consider,
From equation (1) and (2), it is clear that
AB ≠ BA
(ii) Consider,
Now again consider,
(iii) Consider,
Compute theproducts AB and BA whichever exists in each of the following cases:
Answer - 3 : -
BA does not exist
Because the number of columns in B is greater than the rows in A
AB = [0 + (-1) + 6 + 6]
AB = 11
(iv) Consider,
Answer - 4 : -
From equation (1) and (2) it is clear that,
Answer - 5 : -
Answer - 6 : -
Answer - 7 : -
Answer - 8 : -
Answer - 9 : -
Answer - 10 : -