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Applications of Cross Product

If the points...

Question

If the points (1,3), (x,2) and (4,6) are collinear then x=

A

3

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B

2

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C

1

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D

0

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Solution

The correct option is D 0
Area of triangle = 0
or $\frac{1}{2} [1 (2 - 6) + x (6 - 3) + 4 (3 - 2)] = 0$
or $x = 0$ '

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