Question

Find the value of k​

Answer 1

Answer:

Since w is the cube root of unity.

∴w

3

=1&1+w+w

2

=0

(1+w)

7

=A+Bw

⇒(−w

2

)

7

=A+Bw

⇒−(w

3

)

4

w

2

=A+Bw

⇒−w

2

=A+Bw

⇒1+w=A+Bw

∴A=1&B=1