河北省衡水中?019届高三下学期四调数学(?试题 - 百度文库

ߡ𡭡 ߡ𡭡

18׶PABCDĵΣ PO?ABCDOE ֱAD,ABе㣬 AB?6,AP?5,?BAD?60?.

___________š______________________װװ___________:Уѧ𡭡ڡ𡭡֤ AC?PE

ֱPBƽPOEɽǵֵ

IIIDCǷڵFʹBFPAɽǵֵΪ3310ڣȷFλãڣ˵.

19ijֲ浾AӽB浾AĶȶΪ500굥Ϊ3.50Ԫ굥۲ĿΪ10%Ϊ3.60ԪĿΪ60%Ϊ3.70ԪĿΪ30%ͳӽBĶݣõĶƵʷֱֲͼ£ͳƽ10ӽBĵۣλԪ/ֲĶλĶĹϵõ10ݼΪ?xi,yi??i?1,2,L10?õɢͼ£οݼ£

1곣浾Aĵƽֵ

Ծ5ҳ6ҳ

ߡ𡭡

2ƵʷֱֲͼУȡֵмֵ㣬ӽBĶƽֵƵΪʣԤƽж꣬ӽBĶ765ĸʣ 3жӽBĵyλԪ/ֲĶxλĶǷأأԸµIJοyxԻع鷽̣֪˵ӽBֲĶԤΪ2Ķڳ浾AӽBѡֲˮߣ

ͳƲοݣx?1.60y?2.82

??xi?x??yi?y???0.52??xi?x?10102?0.65

ߡ𡭡 i?1i?1nԻع鷽y??bx?ab??i?1?xi?x??yi?y??n?x?x?2

i?1i20֪C:x2?2py(p?0)һM?m,9?佹µľΪ10. 1Cķ̣

2FĵֱlCA,B㣬A,B㴦߷ֱxP,Q㣬AP?BQȡֵΧ. 21֪f(x)??x2?a?lnx. 1a?0ʱf(x)Сֵ 2f(x)??1?e2,?????ֵx1,x2?x1?x2?. iʵaȡֵΧ ii֤?2e2?f?x2???12e. 22ֱϵxOyУֱlIJΪ??x?3?tcos?y?3?tsin?tΪ.

?ԭΪ㣬xΪὨϵCļ귽Ϊ

?2?2?cos??3.

1Cֱ귽̣˵Ǻߣ

2PΪ?3,3?ֱlCAB㣬PA?PBֵ. 23֪f(x)?x?3?mx.

1m??2󲻵ʽf?x??5Ľ⼯

2xIJʽf?x??1RϺʵmȡֵΧ.

Ծ6ҳ6ҳ

𡭡ڶߡװڡװҪװ롭𡭡⡭𡭡ϵͳԶɣϸУԺʹã𰸽ο

ο

1B

z?2?3iz?1?i?ɸʽij˳㻯Ӧ꼴. ⡿ z?2?3i

z?1?i???2?3i??1?i???1?5i

ิz?1?i?ڸƽڶӦĵΪ??1,5?ڵڶ. ѡB. 㾦

⿼˸ʽij˳㣬˸Ĵʾ伸壬ڻ. 2D

ɵõN??0,1,2,3?ɼϵĽõ. ⡿

M??x|?2?x?3?

N=x?Zlog5?x?1??1log5?x?1??log55?0?x?1?5??1?x?4.

Ϊx?Z,N??0,1,2,3,4?ʵõ M?N=?0,1,2?. ʴΪD. 3C

P?90?X?105??⡿

??3˴ѧԳɼ90ֵ105֮ 10𰸵1ҳ24ҳ

ϵͳԶɣϸУԺʹã𰸽ο

P?X?90??P?X?120??P?90?X?105??123P?90?X?120??1?? 5553 103?300 10Դ˴ѧԳɼ90ֵ105֮ԼΪ1000?ѡC 㾦

СҪֲ̬ߵص㼰ʾȻ֪ʶν˼룮ڻ⣮ 4A

SʽԼθеͿɵP(A)?㼴.

SԲ⡿

ʽɵã

?1?332S?3?r2?sin60???r

4?2?2SԲ??r

ɼθеͿɵã

332rS33

P(A)??42?SԲ?r4?ѡA. 㾦

⿼˼θеͼεʽڻ. 5B

˫ߵļʣתƳabcĹϵȻ˫ߵʼɣ ⡿

𰸵2ҳ24ҳ

ϵͷ779662525#qq.com(#滻Ϊ@)