Q.

Which of the following must be the true value of the statements below in that order.

Statement I: arg(z¯)=-arg(z) for any complex number z

Statement II: If |z-z1|-|z-z2|=k where k<|z1-z2|, then the locus of z is a hyperbola.

Statement III: z1,z2,…,zn be the complex numbers representing the vertices of n-sided regular polygon, and ''z0'' is its centre, then ∑i=1nzi2=nz02

Statement IV: If z12+z22+z1z2=0, then z1,z2 and origin form an equilateral triangle.

1 TFFT  
2 FFTF  
3 FFTT  
4 TTTT  

Ans.

(2)

S1→Z can be zero

S2,S3,S4→Use properties of complex numbers