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Question
If the coordinate of point A on the number line is –1 and that of point B is 6, then find d(A, B).
Sum
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Solution
The coordinate of A on the number line is – 1 and that of B is 6.
∵ 6 > – 1
∴ d(A, B) = 6 – (– 1) = 6 + 1 = 7.
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