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JEE Main2002MathematicsBasics of MathematicsActual

If a, b, c are distinct +v e real numbers and a^2+b^2+c^2=1 then a b+b c+c a is

Options

  1. Aless than 1
  2. Bequal to 1
  3. Cgreater than 1
  4. Dany real no.

Correct answer

A. less than 1

Step-by-step solution

a b+b c+c a= (a+b+c)^2-1 2 < 1

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