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

1.	If a² + b² + c² = 1, then ab + bc+ ac lies in the interval
A.
B.
C.
D.	[2, 4]
Answer» C.

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

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