If a,b,c are distinct positive real numb...

If a,b,c are distinct positive real numbers, then

`a^(4)+b^(4)gta^(3)b+ab^(3)`

`a^(4)+b^(4)lta^(3)b+ab^(3)`

`a^(3)+b^(3)lta^(2)b+ab^(2)`

none of these

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