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Q.

The sum of the real parts of the complex numbers satisfying the equations |z4iz2i|=1 and |z8+3iz+3i|=35  is  k5, then ‘k’ satisfies 

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a

2k<25

b

4k25

c

2k<28

d

4k28

answer is B, C, D.

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Detailed Solution

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|z4iz2i|=1z=x+3i  using  this  in  |z8+3iz+3i|=355|x8+6i|=3  |x+6i|   x=8,  17

two  complex  numbers  8+3i,  17+3i         sum  of  real  part  =8+17=25

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The sum of the real parts of the complex numbers satisfying the equations |z−4iz−2i|=1 and |z−8+3iz+3i|=35  is  k5, then ‘k’ satisfies