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If the point A(1,2), O(0,0) and C(a,b) are collinear, then (a) a = b  (b) a = 2b  (c) 2a = b  (d) a + b = 0

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If the point A(1,2), O(0,0) and C(a,b) are collinear, then

(a) a = b 

(b) a = 2b 

(c) 2a = b 

(d) a + b = 0

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Correct answer is (c) 2a = b

The given points are A(1,2), O(0,0) and C(a,b)

Here, (x1 = 1,y1 = 2), (x2 = 0,y2 = 0) and (x3 = a,y3 = b).

Point A, O and C are collinear

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