If a vector 2 i+3 j+8 k is perpendicular to the vector 4 j-4 i+a k . Then the value of a is (a) 1/2

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If a vector 2 i+3 j+8 k is perpendicular to the vector 4 j-4 i+a k . Then the value of a is (a) 1/2 (b) -1/2 (c) 1 (d) -1

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Excellent explanation
For all those having doubt in this question, after seeing this video *see the question carefully*

buddy_gaming
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Love you 💝 sir aap Kai explanation jajab Kai hai ❤❤❤❤

KuldeepSingh-rbfg
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Why we don't take cross product formula?

-ssg
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Sir your answer is wrong because answer is 1/2

UmeshYadav-ycwz