Question

The value of 'm', if i+2j-3k
   is parallel to
3 i+mj-9k
   is
1) 12 2) 9 3) 6 4) 3

Answer 1

Answer

The value of m is 6

Since the angle b/w them is 0°

So, wecan equate for dot product

A.B=|A||B|cos theta

So, by equating this we get the value of m is 6

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