1.

perpendicular to each other. The positive vaiue ofa is:2)24)zero(3)1

Answer»

For this dot product should be 0.

=> P*Q = a*a -2a-3 = 0

=> a²-2a-3 = 0=> a²-3a+a-3 = 0=> a(a-3) + 1(a-3) = 0=> (a-3)(a+1) = 0=> a = 3 , -1



Discussion

No Comment Found

Related InterviewSolutions