1.

Let a, b and c be distinct non-negative numbers. If the vectors abar(i)+abar(j)+cbar(k), bar(i)+bar(k) and cbar(i)+cbar(j)+b""bar(k) lie in a plane, then c is

Answer»

G.M. of a and B
A.M. of a and b
Equal to zero
H.M. of a and b

Answer :A


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