Physics, asked by Yeduvpz3190, 8 months ago

If the vectors a=ai+j-2k and b=ai-2j+k are perpendicular to each other then the positive value of a is

Answers

Answered by janu1154

2

Answer:

condition for vectors to be perpendicular :

a1a2+b1b2+c1/c2 =0
a^2-2-2=0
a^2=4
a=+ or - 2

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