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  3. if a, b, c are real and a + b + c= 1, then ab...

If a, b, c are real and a + b + c= 1, then ab...

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If a, b, c are real and a + b + c= 1, then ab + bc + ca lies in the interval:1(A)(B) [0, 2]9[-2] ON (D)

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