已知实数xy满足x+2y
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已知实数xy满足x+2y已知实数xy满足x+2y已知实数xy满足x+2yz=3x+y=13(x+2y)/6+5(x-4y)/6当x=5,y=2时取到,z最大值17
已知实数xy满足x+2y
已知实数xy满足x+2y
已知实数xy满足x+2y
z=3x+y = 13(x+2y)/6+5(x-4y)/6 < 13x9/6 - 5x3/6 = 17
当x = 5,y=2时取到,z最大值17