Question

If a, b, c are the complex numbers such that a2 + b2 + c2 = 0 and

then value of k is

Solution

Correct option is

4

Using a2 + b2 + c2 = 0, we can write ∆ as

               

[taking a, b, c common from C1, C2, C3 respectively]

                   

                                    

                   

Thus,       k = 4

SIMILAR QUESTIONS

Q1

The system of equations

                   

                   

                   

Has no solution if α =

Q2

The value of determinant

                      

Q3

If abc are different and

Q4

           

Q5

                        

Q7
Q8

                   

Q9
Q10

If a, b and c are all different from zero and

Is equal to zero , then the value of a-1 + b-1 + c-1 is