p=2a-3b,q=a-2b+c and r=-3a+b+2c, where a,b,c being non-coplanar vectors, then the vector -2a+3b-c is equal to

If a, b and c are unit coplanar vectors, then [[2a-b, 2b-c, 2c-a]] is equal to

If a,b,c are three non-coplanar vector, then the vectors equation r = (1 -p-q) a +p b +qc respesents a

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 vectors a+lambda b+3c,-2a+3b-4c and a-3b+5c are coplanar and a,b,c are non-coplanar,then the value of lambda is