2x²+y²/3=86x²+y²=24√[12x²(6+2y²)]≤[12x²+(6+2y)²]/2=6x²+y²+3=24+3=27所以12x²(6+2y²)≤729所以x²(6+2y²)≤243/4开根号,x>0所以x√(6+2...