P-80.If vector a = i+2j-3k and vector b = 3i-j+2k, show that vectors (a+b) & (a–b) are perpendicular

P-80.If vector a = i+2j-3k and vector b = 3i-j+2k, show that vectors (a+b) & (a–b) are perpendicular

Class 12. Vector Analysis.

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Tangent Academy, Maths.
Abhay Kumar.