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Question

Length of the line segment joining the points -1 -i and 2 + 3i is

A

– 5

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B

15

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C

5

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D
25
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Solution

The correct option is C

5


Since the coordinates in complex plane are (2, 3) and (-1), 1 Hence the required distance is 5.

Trick : We know that the distance between z1 and z2 is |z1z2| therefore, the required length |2 + 3i + 1 + i| = 5.

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