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2020年四川省宜宾市中考数学试?WORD?含答?.doc - 百度文库

Դû ʱ䣺2025/7/10 19:59:30 loading ƪĵֻ
˵ݽԤݿܲȫҪĵҪݣwordʹáword΢ź:xxxxxxxQQxxxxxx ܸṩĵл֧½⡣

20С7֣

ijΪʧũҵ202060λҵʧũҵʧũнƻ10Ԫ.׼ǣʧũҵӪһϵĸ1000Ԫҵҽ5ʧҵԱȶҵһϵģٸ2000Ԫ.ʣʧũҵӪһϵĺҵҽ5ʧҵԱȶҵһϵũֱжˣ

21С7֣

ͼһκͼ뷴y1= C x ( x<0ͼཻA㣬yᡢxֱཻBC㣬C20).xC1ʱһκֵСڷֵ. (1) һκĽʽ

(2) 躯y2= x (x>0)ͼy1= C x (x<0)ͼyԳ.y2= x (x>0)ͼ

ȡһPPĺ2)PPQxᣬQıBCQP2P.

yy1y23

a3a

ABPOCQx(21ͼ)

22С7֣

ͼɻˮƽABֱߣУǰһɽΪ˱ɻйͣͱɽM·ABľMN.ɻܹиǺͷеľ루ȫأɻܷɵɽϷNŲо룩һMNķҪ

(1)ָҪݣĸʾͼб) (2)òдMNIJ.

ABNM(22ͼ)

23С10֣

֪ڡABCУACΪֱġOBCڵDӻADȡһEʹEBC =

DECӳBEνACGOH. (1)֤ACBH (2)ABC= 45㣬Oֱ10BD =8CEij.

AHGOEBDC(23ͼ)

2020年四川省宜宾市中考数学试?WORD?含答?.doc - 百度文库.doc ĵWordĵصԣ㸴ơ༭ղغʹӡ
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