Question

76. Four points z, Z2, Z3, Z, are cocyclic
if
76.
(z- Z) (zz - Z)
(z- z2)(23 - 2)
is
(A) Purely real
(B) Purely imaginary
(C) Zero
(D) None of these​

Answer 1

$\rm\underline\bold{Answer \purple{\huge{\checkmark}}}$

(C) Zero