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Question

Question: The complex number which satisfies the equation z +\(\sqrt{2}\) \| z + 1\| + i = 0 is...

The complex number which satisfies the equation

z +2\sqrt{2} | z + 1| + i = 0 is

A

2 + I

B

– 2 + I

C

– 2 – I

D

2 – i

Answer

– 2 – I

Explanation

Solution

Sol. Let z = x + iy Ž x + iy +2\sqrt{2}| (x + 1) + iy| + i = 0

(x + iy) +2\sqrt{2} ((x+1)2+y2\sqrt{(x + 1)^{2} + y^{2}}) + i = 0

x +2\sqrt{2} ((x+1)2+y2\sqrt{(x + 1)^{2} + y^{2}}) +i(y + 1) = 0 + i0

Comparing y = – 1, x = – 2 so, z = – 2 – i