If the points `P(a + 2b + c), Q(2a + 3b), R(b + tc)` are collinear, where `a, b, c` are three non-coplanar vectors,the value of t is

If the points P(vec a + 2 vec b + vec c), Q (2 vec a + 3 vec b), R(vec b + t vec c) are collinear, where vec a, vec b, vec c are three non-coplanar vectors, the value of t is

If the points P( veca + 2 vec b + vec c ), Q (2 veca + 3 vecb), R (vecb+ t vec c ) are collinear, where veca , vec b , vec c are non-coplanar vectors, the value of t is

If the points P( veca + 2 vec b + vec c ), Q (2 veca + 3 vecb), R (vecb+ t vec c ) are collinear, where veca , vec b , vec c are non-coplanar vectors, the value of t is

If the points P(bara+2barb+barc),Q(2bara+3barb) and R(barb+tbarc) are collinear, where bara,barb,barc are three non-coplanar vectors, then the value of t is...a) -2 b) -1/2 c) 1/2 d) 2

If the points P(bara+2barb+barc).Q(2bara+3barb) and R(barb+tbarc) are collinear, where bara,barb,barc are three non-coplanar vectors, then the value of t is

Show that the vectors a-2b+4c,-2a+3b-6c and -b+2c are coplanar vector, where a,b,c are non-coplanar vectors.