A) \[a\sqrt{2}-1\]
B) \[a\sqrt{2}+1\]
C) \[0\]
D) \[a\]
Correct Answer: A
Solution :
\[|z-{{z}_{0}}|\,\,=r\], represents a circle so the least modulus of \[z\]is \[|{{z}_{0}}{{|}^{2}}-r\].
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