百科全書

標題:

Maths. Section Formular

發問:

Let A(-13,-5) and B(1,-12) be two given points. Find the ratio AP:PB and the coordinates of P if (i) AB:AP = 7:3 (ii) PB:AB = 2:7

最佳解答:

• jj得７－８ｃｍ好短@1@
• UK Sorting Code ~~(((超急)))
• 養狗狗要什麼必需品 -@1@

此文章來自奇摩知識+如有不便請留言告知

Let A(-13,-5) and B(1,-12) be two given points. Find the ratio AP:PB and the coordinates of P if (i) AB:AP = 7:3 (ii) PB:AB = 2:7 (i)AB:AP=7:3, AP:BP=3:4 若P為內分點, P([3x1+4x(-13)]/(3+4), [3x(-12)+4x(-5)]/(3+4) =P(-7,-8) 若P為外分點, P([-3x1+4x(-13)]/(-3+4), [-3x(-12)+4x(-5)]/(-3+4) =P(-55,16) (ii) PB:AB = 2:7 AP:PB=5:2 若P為內分點, P([5x1+2x(-13)]/(5+2), [5x(-12)+2x(-5)]/(5+2) =P(-3,-10) 若P為外分點, P([5x1-2x(-13)]/(5-2), [5x(-12)-2x(-5)]/(5-2) =P(31/3,-50/3)

其他解答: