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If a ,b ,c in R^+ , then the minimum v...

If `a ,b ,c in R^+` , then the minimum value of `a(b^2+c^2)+b(c^2+a^2)+c(a^2+b^2)` is equal to (a)`a b c` (b)`2a b c` (c)`3a b c` (d)`6a b c`

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