Question

They said,” We have written the exam well”. change into reported speech. ​

Answer 1

Answer:

If n=3

[A|B]=⎡⎣⎢−1111−1111−1|a|b|c⎤⎦⎥

Reduce it to Echelon form as

[A|B]=⎡⎣⎢−100102120|a|a+b|a+c⎤⎦⎥

So we get

−x+y+z=a

2z=a+b

2y=a+c

and find value of x,y and z from above equations

If n=4

[A|B]=⎡⎣⎢⎢⎢⎢−11111−11111−11111−1|a|b|c|d⎤⎦⎥⎥⎥⎥

Reduce it to Echelon form as

[A|B]=⎡⎣⎢⎢⎢⎢−1000102212021220|a|a+b|a+c|a+d⎤⎦⎥⎥⎥⎥

So we get

−x+y+z+p=a

2z+2p=a+b

2y+2p=a+c

2y+2z=a+d

and find value of x,y,z and p from above equations

Similarly,do with other values of n

Answer 2

Answer:

they told that they had written the exam well.