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Question

What is the reflection of the point A(1,2) in the line x=1?


A

(1, 2)

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B

(1, -2)

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C

(-1, -2)

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D

(-1, 2)

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Solution

The correct option is A

(1, 2)


x=1 is a straight line parallel to the y-axis and at a distance of 1 unit from it.

Point A(1,2) is an invariant point since it lies on the line x = 1. Hence its image is the point A(1,2) itself.


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