Let us understand that, two more points are said to be collinear if they all lie on a single straight line.
We have the position vectors as,
Since, a and b are collinear. We can draw a relation between and .
Putting the values of and , we get
Comparing L.H.S and R.H.S, we get
2 = –6λ
And –3 = mλ
We need to find the value of λ in order to find m.
2 = –6λ
Putting the value of λ in equation –3 = mλ
⇒ m = 3 × 3
⇒ m = 9
Thus, the value of m = 9.
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