are three non-zero vectors; no two of them are parallel. If is collinear to and is collinear to , then is equal to
In tossing of a coin (m + n)(m > n) times, the probability of coming consecutive heads at least m times is
The differential equation of all circles touching the axis of y at origin and centre on the x-axis is given by
None of these
If are two non-zero non-collinear vectors, then is equal to
None of these
A.