Question

16.
1 -1
1
If A=2 3 0 find adj A and show
18 2 10
that A. (adj A) = 0 where 0 is the null matrix
of order 3.
Or
(b)
By using Cramer's rule solve the following:
2x – 3y + z = 7; 2x + y-z=1, 4y= 3z=11.
17.
(a)
A person sells a bill one month before the
legally due date at 12% p.a. and invests and
amount in a security which just offsets the
loss in discounting. Find the rate of interest
paid for the investments in the security.
Or
(b)
If A = {2,3,6) B = {1,5,10), C = {3,5,6)
D= {1,2,10} prove that (
AC)x(BOD)=
(AxB) (CxD)​

Answer 1

Answer:

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Step-by-step explanation:

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