complex no.

if /z/ = max{ /z-1/ , /z+1/ } then, 1./z+conjugatez/=1\2
2.z+ conj. z =1
3./z+conj.z /=1
4.none

8 Answers

62
Lokesh Verma ·

if /z/ = max{ /z-1/ , /z+1/ } then, '

think in terms of graph...

distance from zero is same as max of distance from 1 and -1

hence if Re(Z) > 0 then Re(Z) = 1/2

(This comes from the graph if you can figure out!!)

also if Re(Z) < 0 then Re(Z) = -1/2

62
Lokesh Verma ·

Thus Z+Z = 1 or -1

thus c is the right answer..

33
Abhishek Priyam ·

But let z=1/2+0i

|z|=1/2
|z-1|=1/2
|z+1|=3/2

so |z|=≠max(1/2,3/2)

62
Lokesh Verma ·

oops galat jawaab...

the question should be min(|z-1|,|z+1)

probably..

62
Lokesh Verma ·

so the answer to this one should be no such point exists!

33
Abhishek Priyam ·

x2+y2=max((x-1)2+y2,(x+1)2+y2)

for x>0
max((x-1)2+y2,(x+1)2+y2) = (x+1)2+y2

so x2+y2=(x+1)2+y2
x=-1/2 but x>0 so no x

similarly for x<0 x=1/2 not possible..

so (d)

33
Abhishek Priyam ·

yes for min{} it will be |z+z|=1

1
vaishnavi bansal ·

thanxxxx

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