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標題:
A maths question
發問:
Given that the vertices od a triangle are A( -3, 1) , B( p, 3) and C(11,4). (a) Find the area of the triangle in terms of p. (b) Hence, find the value of p if A, B and C are collinear. 我唔識b part 所以淨係需要b part 列式 注明：ｂ part 係有hence. 所以用返a part既野 thx 更新: p.15
最佳解答:
by (a): we have 1/2*(3p-42) since area =0 if A,B and C are collinear therefore, p=7 2006-12-07 13:14:18 補充： p=12 2006-12-07 13:23:12 補充： sorry, by a part ,area=1/2*(3p-19)p=19/3
A maths question
發問:
Given that the vertices od a triangle are A( -3, 1) , B( p, 3) and C(11,4). (a) Find the area of the triangle in terms of p. (b) Hence, find the value of p if A, B and C are collinear. 我唔識b part 所以淨係需要b part 列式 注明：ｂ part 係有hence. 所以用返a part既野 thx 更新: p.15
最佳解答:
by (a): we have 1/2*(3p-42) since area =0 if A,B and C are collinear therefore, p=7 2006-12-07 13:14:18 補充： p=12 2006-12-07 13:23:12 補充： sorry, by a part ,area=1/2*(3p-19)p=19/3
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