1.

Let vec a=3hat i+2hat j+4hat k, vec b=2(hat i+hat k) and vec c=4hat i+2hat j+3hat k .Sum of the values of alpha for which the equation xvec a+yvec b+zvec c=alpha(xhat i+yhat j+zhat k) has non-trivial solution is:

Answer»

-1
4
7
8

Answer :C


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