Complex Numbers 2 Question 7
7. If is a complex number such that , then the minimum value of
(a) is equal to
(2014 Main)
(b) lies in the interval
(c) is strictly greater than
(d) is strictly greater than
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Answer:
Correct Answer: 7. (b)
Solution:
is the region on or outside circle whose centre is and radius is 2 .
Minimum
Geometrically Min
Hence, minimum value of