VectorHard

Question

Let a, b, c , be distinct non- negative numbers . If the vectors and lie in a plane, then c is

Options

A.the Arithmetic Mean of a and b
B.the Geometric Mean of a and b
C.thr Harmonic Mean of a and b
D.equal to zero

Solution

Since, three vectors are coplanar.
     
Applying C1 → C1 - C2
⇒    
⇒     -1(ab - c2) = 0 ⇒ ab = c2

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