初升高数学衔接教?完整) - 百度文库 ر

2.mʲôʵʱxķmx-1-mx+m=0ûʵ

3.֪y=

2

123x3xʹֵ0xȡֵΧ 24

һԪβʽĽⷨ

һԪβʽĽⷨһԪβʽĽⷨڱһµģ಻ʽɴӷĴСϵȥ. 1.ϵaaķŷࣩ 1.xIJʽax?(a?2)x?1?0.

9

2

2.xIJʽax2?5ax?6a?0(a?0)

2.бʽ?ķŷ

3.xIJʽx?ax?4?0.

4.xIJʽ(m?1)x?4x?1?0.(mΪʵ)

222 10

3.ax?bx?c?0ĸx1,x2ĴСࡣ

5.xIJʽx?(a?)x?1?0(a?0)

6.xIJʽx2?5ax?6a2?0(a?0) ϰ

1.xIJʽx2?(a?2)x?a?0.

2.xIJʽax?(a?1)x?1?0. 3.xIJʽax?ax?1?0. 4.xIJʽ(a?1)x?3ax?3?0

Ľ һԪߴβʽʽʽĽⷨ

1.һԪߴβʽĽⷨ

1.ɽһԪߴβʽı׼ʽ

222221a2 11

(x?x1)(x?x2)(x?xn)?0(?0)

1ǹxһʽĻ 2ұ0

3ʽߴϵΪ 2.һԪߴβʽĽⷨ

1ߴβʽΪ׼ʽ 2x1,x2,,xnᣬ

3Ͻǿʼʱԭǡ󴩣´洩ż (4)дĽ⼯

1.(x?1)(x?2)(x?3)?0

2.x(x?1)(x?2)(x?1)?0

3.(x?1)(x?2)(3?x)?0

12

2