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Question

The distance between the points (a, b) and (– a, – b) is:


A

a2 + b2

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B

√(a2 + b2)

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C

0

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D

2√(a2 + b2)

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Solution

The correct option is D

2√(a2 + b2)


Let A(a,b) and B(-a,-b) be the two points and 'd' be the distance between them.

By using distance formula, we get

d = (a(a))2+(b(b))2

d = (2a)2+(2b)2

d = 2a2+b2


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