If x > 0, Y > 0, and X + 2Y = 4, then the minimum value of 1x + 2Y is 0___ .

If x > 0, Y > 0, and X + 2Y = 4, then the minimum value of 1x + 2Y is 0___ .

∵ x > 0, y > 0, and X + 2Y = 4, ∵ 1x + 2Y = 14 (x + 2Y) (1x + 2Y) = 14 (5 + 2yx + 2XY) ≥ 14 (5 + 22yx · 2XY) = 94, if and only if x = y = 43, take the equal sign