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Sahay Sir > Question Answers > NCERT Exemplar Class 12 > Maths > Chapter 10 - Vector Algebra > Example 29 Three vectors a, b and c satisfy the condition a + b + c = 0 . Evaluate the quantity u = a . b + b . c + c . a, if I a I = 3, I b I = 4, and I c I = 2

Example 29 Three vectors a, b and c satisfy the condition a + b + c = 0 . Evaluate the quantity u = a . b + b . c + c . a, if I a I = 3, I b I = 4, and I c I = 2

and I c I = 2 b and c satisfy the condition a + b + c = 0 . Evaluate the quantity u = a . b + b . c + c . a Example 29 Three vectors a I b I = 4 if I a I = 3