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Questions  

 Suppose that three points  z1, z2, z3  are connected by the relation  az1 + bz2 + cz3 = 0, where a + b +c=0 then the points are

a
vertices of a right triangle
b
vertices of an isosceles triangle
c
vertices of an equilateral triangle
d
collinear

detailed solution

Correct option is D

z3=−1caz1+bz2=az1+bz2a+b

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