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for 2 vector to be parallel the direction ratio of the 2 vector must be same ...
I.e for l= 1/3
for m=(-1)/(-3)=1/3
for n = 2/6=1/3
here the direction ratios l,m,n are equal so 2 vector are parallel
I.e for l= 1/3
for m=(-1)/(-3)=1/3
for n = 2/6=1/3
here the direction ratios l,m,n are equal so 2 vector are parallel
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