$26. If two vectors 2î +3j - k and -4i-6j -ak are parallel
to each other, then value of 2 will be
(2) 0 (b) 2 (c) 3 (1) 4
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Answer:
if you're asking the value of a then option b
Explanation:
Think of them as two st lines
since they are parallel the ratio of the coefficients will be equal ( a vector shifted parallel to itself remains unchanged so you can consider c1/c2 = b1/b2 = a1/a2 for parallel lines here)
therefore the ratio is -2
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