2條F.2 ge數......

唔明你想做咩...?

2007-11-24 16:37:10 補充：
哦....係咪做個步驟出黎?1.x = 1-y / 1 y(1 y)x = 1-yx xy = 1 - yx - 1 = -y - xy1 - x = xy y y = (1-x) / (x 1)2.y= a bx / c dx(c dx)y = a bxcy dxy = a bxcy - a = bx - dyxx = (cy-a) / (b-dy) = (a-cy) / (dy-b)

2007-11-24 16:53:24 補充：
第一條尾二果句出漏左個減號, 即「1 - x = xy y」應該係 1 - x = xy - y

1.x = ( 1 - y ) / ( 1+ y)
x + xy = 1 - y
x = 1 - y - xy
x - 1 = - y ( 1 + x )
1 - x = y ( 1 + x )
y = ( 1 - x ) / ( 1 + x)

2.y = ( a + bx ) / ( c + dx )
cy + dxy = a + bx
cy - a = bx - dxy
cy - a = x ( b - dy )
( cy - a ) / ( b - dy ) = x