Latest IIT-JEE Aptitude Question SOLUTION: Let a = -ˆi - kˆ , b = -ˆi + j   and c = ˆi + 2ˆj+ 3kˆ  be three given vectors. If r  is a vector such that r ´ b = c´ b     and r × a = 0   , then the value of

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Let a = -ˆi - kˆ , b = -ˆi + j
 
and c = ˆi + 2ˆj+ 3kˆ 
be three given vectors. If r

is a vector such that r ´ b = c´ b
   
and r × a = 0  
, then the value of r × b
 
is

Asked In IIT-JEE MAN (10 years ago)

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