A(6, 0)为了避免混淆，令P(p, q), p > 0, q > 0在直线y= -x+6上, q = 6 - p, p = 6 - q, P(6 - q, q)或P(p, 6 - p)A三角形POA的底 = |OA| = 6，高h = q = 6 - p > 0S = (1/2)*6*q = 3q = 3y
S = (1/2)*6(6 - p) = 3(6 - p) = 3(6 - x)
S = 3y = 8, y = 8/3, x = 6 - 8/3 = 10/3P(10/3, 8/3)... |
