Question

by using cramers rule x+ Y - Z =1, 8 x + 3 Y - 6 Z =1,-4 x - y + 3 z=1

Answer 1

Answer:

Correct option is

A

7,−10,4

Δ=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

1

1

2

4

1

3

9

∣

∣

∣

∣

∣

∣

∣

∣

=−3Δ

1

=

∣

∣

∣

∣

∣

∣

∣

∣

1

6

3

1

2

4

1

3

9

∣

∣

∣

∣

∣

∣

∣

∣

=−21Δ

2

=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

1

1

6

3

1

3

9

∣

∣

∣

∣

∣

∣

∣

∣

=30Δ

3

=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

1

1

2

4

1

6

3

∣

∣

∣

∣

∣

∣

∣

∣

=−12x=

Δ

Δ

1

=

−3

−21

=7y=

Δ

Δ

2

=

−3

30

=−10z=

Δ

Δ

3

=

−3

−12

=4