ijУΪʵʩҡӪ̣͡ʳüסԭƳijӪʳƷ֪ԭϵάCԭϵļ۸±ԭάC۸ԭԭά-ѧ

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ijУΪʵʩҡӪ̣͡ʳüסԭƳijӪʳƷ֪ԭϵάCԭϵļ۸±
ԭ
άC۸
ԭԭ
άCλ/ǧˣ600400
ԭϼ۸Ԫ/ǧˣ95
ҪӪʳƷ20ǧˣҪÿǧٺ480λάC蹺ԭxǧˣ
1Ҫԭ϶ǧˣ
2ʳڹԭϵܷΪyԪyxĺϵʽ˵ԭ϶ǧʱܷ٣
ͣ  Ѷȣе

1⣬600x+40020-x48020
x8
Ҫԭ8ǧˣ
Ҫԭ8ǧˣ

2ãy=9x+520-x
y=4x+100
k=40
yx
x8
൱x=8ʱyСy=48+100=132
๺ԭ8ǧʱܷ٣132Ԫ
𣺹ԭ8ǧʱܷ٣132Ԫ

רȨ⡰ijУΪʵʩҡӪ̣͡ʳüסԭƳij..Ҫ  һκĽʽһκӦ  ȿ⡣Щġ£

һκĽʽһκӦ

ƣһκĽʽһκӦ

  • ϵһκĽʽ
    ʽٸȷʽеδ֪ϵӶõĽʽķ

    һκӦã
    ӦһκӦ⣬һдʽ⣬跨⡣
    1ͼģעʾʵ弰λ
    2עԱȡֵΧ

  • ôϵһκʽĸ裺
    һ裩һʽһκͨʽ
    ڶʽó̻򷽳顣
    󣩣ͨз̻򷽳ϵkbֵ
    IJддúĽʽ

    һκӦ漰⣺
    һֶκ
    ֶκڲͬвͬӦʽĺҪرעԱȡֵΧĻ֣ҪѧҪ
    ʵʡ

    Ķ
    жʱԷЩĹϵѡȡһΪԱȻѰ
    Էӳʵĺ


    1򵥵һκ⣺ٽģ͵ķڷֶκ˼Ӧá
    2Dz÷ֶκĹؼ

    еӦã

    1.ʱtһsٶvһκs=vt
    2.ˮسˮٶfһˮˮgdzˮʱtһκˮԭˮSg=S-ft
    3.ԭbδʱijȣһʱɹijyxһκy=kx+bkΪ

  • һκӦóùʽ
    1.ͼkֵy1-y2)/(x1-x2)
    2.xƽ߶εе㣺(x1+x2)/2
    3.yƽ߶εе㣺(y1+y2)/2
    4.߶εij[(x1-x2)2+(y1-y2)2 ]
    5.һκʽͼ񽻵꣺ʽ
    һκ y1=k1x+b1; y2=k2x+b2 y1=y2 k1x+b1=k2x+b2 õx=x0ֵy1=k1x+b1 ; y2=k2x+b2 ʽһʽ õy=y0 (x0,y0)Ϊ y1=k1x+b1 y2=k2x+b2
    6.2߶εе꣺[x1+x2/2y1+y2/2]
    7.2ߵһκʽx-x1/(x1-x2)=(y-y1)/(y1-y2) (ĸΪ0Ϊ0)
    x,yΪ + +ʱõڵһ
    x,yΪ - +ʱõڵڶ
    x,yΪ - -ʱõڵ
    x,yΪ + -ʱõڵ
    8.ֱy1=k1x+b1//y2=k2x+b2k1=k2b1b2
    9.ֱy1=k1x+b1y2=k2x+b2k1k2=-1
    10.
    y=kx-n+bֱƽnλ
    y=kx+n+bֱƽnλ
    y=kx+b+nƽnλ
    y=kx+b-nƽnλ
    ھҼxϼ¼b
    11.ֱy=kx+bxĽ㣺(-b/k0) yĽ㣺(0b)

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