Complex Numbers 2 Question 28

29. Let z be any point in ABC.

The |z+1i|2+|z5i|2 lies between

(a) 25 and 29

(b) 30 and 34

(c) 35 and 39

(d) 40 and 44

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Answer:

Correct Answer: 29. False

Solution:

  1. |z+1i|2+|z5i|2

=(x+1)2+(y1)2+(x5)2+(y1)2=2(x2+y24x2y)+28=2(4)+28=36[x2+y24x2y=4]



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