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Distance between Any Two Points on X-Y Plane

If x, 2,-3,-4...

Question

If (x , 2), (−3, −4) and (7, −5) are collinear, then x =

(a) 60

(b) 63

(c) −63

(d) −60

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Solution

We have three collinear points.

In general if are collinear then,

So,

So,

Therefore,

So the answer is (c)

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(a) −63 (b) 63 (c) 60 (b) −60 [CBSE 2014]

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Q. If the points A(x, 2), B(−3, −4) and C(7, −5) are collinear then the value of x is [CBSE 2014]
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