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Question

If |z+2+3i|=5, then the locus of z is:

A
A circle with centre (2,3) and radius 25 units
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B
A circle with centre (2,3) and radius 25 units
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C
A circle with centre (2,3) and radius 5 units
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D
A circle with centre (2,3) and radius 5 units
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Solution

The correct option is D A circle with centre (2,3) and radius 5 units
we know
|zz1|=c
represents a circle with center at z1 and radius = c in complex plane
Comparing with |z+2+3i|=5
or |z(23i)|=5
Hence, the locus is a circle with centre at (2,3) and radius 5

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