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MathematicsComplex NumberGeometric ApplicationHard2 minPYQ_2021
MathematicsHardsingle choice

Let C be the set of all complex numbers. Let

S1=zC| z32i2=8,

S2=zC| Rez5  and

S3=zC| zz¯8.

Then the number of elements in S1S2S3 is equal to

Options:

Answer:
A
Solution:

S1:z-3-2i2=8

z-3-2i=22

x-32+y-22=222 (Put z=x+iy)

S2:x5

S3:z-z¯8 (put z=x+iy)

2iy8

2y8   y4,y-4

So, the required diagram is 

Hence, nS1S2S3=1

Stream:JEESubject:MathematicsTopic:Complex NumberSubtopic:Geometric Application
2mℹ️ Source: PYQ_2021

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