Question -
Answer -
Let there be a systemof n simultaneous linear equations and with n unknown given by
Solving determinant,expanding along 1st row
⇒ D = 1(1) – (3)(2)
⇒ D = 1 – 6
⇒ D = – 5
Again,
Solving determinant,expanding along 1st row
⇒ D1 =1(1) – (2) (4)
⇒ D1 =1 – 8
⇒ D1 =– 7
Solving determinant,expanding along 1st row
⇒ D2 =1(4) – (1) (3)
⇒ D2 =4 – 3
⇒ D2 =1
Thus by Cramer’s Rule,we have
