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  • Mechanical Engg. Set-1 GATE (2015)
  • Directions: Carry One Mark Each. If a2 + b2 + c2 = 1, the...
Multiple choice

Directions: Carry One Mark Each.

If a2 + b2 + c2 = 1, then ab + bc + ac lies in the interval

  1. $\bigg[1, \frac{2}{3} \bigg]$
  2. $\bigg[\frac{-1}{2} , 1\bigg]$
  3. $\bigg[-1, \frac{1}{2} \bigg]$
  4. [2, –4]

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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