數(shù)學(xué)實(shí)際問題反比例函數(shù)課件維語已翻譯

1、12?i?f ?40 ?44? ?r4l? ?rra4?t0 ?r? ?4? ?4?4? ?rf?rtrt 4cr?l.? ?4ft?4trl? ?4a4l? ?1?0 ?4?4?4?4r4? ?c? ?4?4f ?4?4r4? ?4?40r5? ?r ?4a?4r? r?4r? ?44 4r?f ?4t?0 ?i? ?r ?4a?4r? ?4r?4r? ?4?40 ? ?4? ?4?44?4r?r? ?4a4? ?rr0 ?4a4?4r4? ?ra4a4rrf ?r? r4f?14l. ?r? ?4?t? ?44at?l ?r?t? ?.rri4r4r ?0 ?f4?f?f rft ?r?3

2、?r4?tr?4a4?l ? ?r4?tr?4a4?l ?r?0?rar?4?r? ? ?r4?tr?r?0?rar?4?r? ?4trl? ?4a4l? ?1?0 ?4?4?4?4t?: (1) l12000.5?4?r ?rr?r0r5?:l600f 400=5 . 1600=f? ?a: ? ?cr?l ?4ft? 400 ?4 ? ?rr ?4a4l ?t?.1-?r4f. ?a?r? ?4?l ?4t? ?ra40 ?c? ?40 ? ?4?4? ?rl?f4cr?l ?t?0 ?4a4?l ?r? ? ?4a4?l ?r4?tr? ?rf?r0r5? ?rff4l ?t?0 ?4?

3、 ?t? 1200 ?4 ? 0.5 ?4tf ?4ar?4? ?trf.(1) ?r?0?rar?4?r? ? ?ra40 ?r?0?rar?4?r? ? ?r4?tr? ?4r4? ?l ?4tr?4r? ? 4r?f ?05(1)?4? r?4a40 ?4t?0: fl=600.?4?r ?rr?r0r5?:600=lf1600=400=200=322003-1.5=1.5fl ?rft? ?rr ?a4l ?r? 400 ?4?4 ?4?4f4?t? ?4arrf? ? ?r? ?r?0?rar?4?r? ? ?4r4?tr? ?4ft? rr? 1.5 ?4tf ?4?r? ?t?.

4、6(4) a? b? c ? d ?5 ?4? ?r?0?rar?4?r? ? ?r4r? ?4? ?t? 1 ?4tf 1.5 ?4tf 2 ?4tf 3 ?4tf ?t?0 ?44cr?l ?4?4?4t? ?44a4? ? ?4?4? ?rl?f4cr?l ?t?0. ?r? ?40 ?444? ? ?cr?l ?rr ?4?4t?0 ?4r? ?r4rf?4?4?4l? ?4?110?rt? ?4ft ?r4f?4?0?4t?:1600600;af1 5600400;bf2600300;cf 3600200.df ?r?: ?r?0?rar?4?r? ? ?r4?tr? ?r? ?tr

5、?t?0 ?rr ?4?44a4l ?fr? rr? r? ?4t?0.?4?4?40 ?r4rf?r4r?4?40 ?r?l r?r ?4?600fl7?4?i?4? ?14? rft ?r? ?r?0?rar?4?r? ? ?r4?tr? ?r? ?tr?t?0 ? rr? ?4a4at?44a?r4?tr?r ?4a?4r? r?4r?r?0?rar?4?r? ? ?r4?tr? =?r?0?rar?4?r? ?4a4?l ? ?4a4?l ? ?r4?tr?8 (5) ?r? ?44? ?4t?4?t?(?r? ?4a4?l ?r?)?4 ?404?lr ?44ff4l ? ?rt?0

6、 ? ? ?44?4ft? ?4r? 500 ?4 ?4a4?l ? ?4r4?tr? 2000 ?4tf?a4? ? r?r? ?ra4l ?4ft? ?4a4r?l ?4l?a?r? ?r?0?rar?4?r? ? ?4?4r4?tr? ?r14? ?4? ?r? ?4? ?4?4? ?rtrt 4cr?l?r?4t?4t?: (1) ?4?4a4rrf r?4a40 ?4t?0:fl610252106=1.21032?4?r ?rr?r0r5?:321.2 10flf=500, l=2.41029(m)9 (6) ?4? ?r4f4a?rr ?4?4a?r? ? ?4?4? ?44cr?

7、l ?4?r? ?4a4?l ?r? r?4a40 ?f? ?4ft?0. ?4t?c ?r?0?rar?4?r? ? ?r4?tr? 1.2 ?4tf ?t?0 ?44cr?l ?4?4t? ?t 44a4? ? ?44cr?l ?500 ?4 ?r? ?r? ?4?r? ?4a4 ?r?t?0 300 1?4 ?r? ?0 ?rt?0 ? ?r?0?rar?4?r? ? ?r4?tr? ?4a4r?l ?t?0 ?rt? ?r4at? ?4? ?0 ? ?4cr?l1.2500=300 x?4t?: ?4?r? ?r?0?rar?4?r? ? ?r4?tr? x ?4tf ?t?0 ?rt

8、? ?4at? ?t? ? r?r? ?ra4l:?0 ?rrr?: x=2? ?a: ?4?r? ?r?0?rar?4?r? ? ?r4?tr? 2 ?4tf ?t?0 ?rt? ?4at? ?t?.?r?4t?4a4?l ?4a4?l ? ?r4?tr?=?r?0?rar?4?r? ?r?0?rar?4?r? ? ?r4?tr?10?tat? ?4fa4? ?tat? ?440? rr? ?4?4?4r ?4 ?l p (? )? ?4? ?4r? ?tat? ?f4rt0 u (?t? ) ? ?tat? ?440? rr? ?tat? ?4a4?l r (?) ?4r4? ?f ? 4

9、r?f ?0: pr=u2?1? ?5?:1. ?4?4?4l? ?4?4? ?f ?4rt? ?4t?0:p2. ?4?4?4l? ?4?4? ?f ?4rt? ?4t?0:r=_ru2pu2112-?r4f. ?40 ?tat? ?440? rr? ?tat? ?4?4a4?l 110220 ? ?4?4? ?a4?4ir ?4t?0. ?tat? ?f4rt0 220 ?t? ?0 ?40? rr? ?tat? ?t? ?4?4?f4r? ?rt?0:(1) ?4?4?4r ?4 ?l p ?ra40 ?tat? ?4a4?l r?4 ?4tr?4r? ?4 4r?f ?l(2) ?ta

10、t? ?440? rr? ?4?4?4r ?4 ?l ?r?l ?4?4? ?4t?0?4t?:urp2202?r? ?4?4?4r ?4 ?l p? ?tat? ?4a4?l r?4 ?r ?4a?4r? ?rr?4r? ?4t?0.12?4t?: ?4?f? ?4at ?5? ?4t?0 ?tat? ?4a4?l ?tr?i?r ?4 ?l ?ra?4r4?.4401102202p?tat? ?44?4a4?l ?r? ?r ?4ff4l 220r=? ?c?f? ?r?l ?4at? ?4?4?4?4r ?r? ?4r4? ?4?4?4r ?4 ?l ?4t?0 ?r?:22022022

11、02p?tat? ?440? rr? ?4?4?4r ?4 ?l 220440 (? ) ?4?4? ?4t?0.?tat? ?44?4a4?l ?r? ?4r4? ?4ff4l r=110? ?c?f? ?r?l ?4at? ?4?4?4?4r ?r? ?r ?4?4?4r ?4 ?l ?4t?0 ?r?:(2) ?tat? ?440? rr? ?4?4?4r ?4 ?l ?r?l ?4?4? ?4t?0rp220213?4?0 ?c?1t?r4f ?rt?40 ?1? ?4?t0: ?4?4? ?r? ? ?rr? ?44?4?4r ? ? ?4r?c?t?f? ?44a? ?4?r ?1

12、?4t?l ?4ft ?a4?4ir ?4t?0?44a?4?4? ?r? ? ?rr? ?44?4?4r ? ? ?4r?c?t?f? ?44a? ?4?r ?1?4t?l ?tat? ?440? rr? ?4?4?4r ?4 ?l ?4?4?4?r ?44a4?tr0. ?4?4?4r ?444 ?l ?r-?4?4a?4r4? ?rir ?4a4l? ?4?4?4l? ?4?4? ?a4?4ir ?4t?0.14?ra4? ?4?t0:1. r?rrt5? ?4t ?r ?t?0 r?44?r 8m3 ?r ?4?4?4r ?0? ?ra40 ?r ?rr? 4?4?4r 6 rr?r

13、?4?rrt5? rffr? ?r ?4?t? ?4?4r ?rtrt?.(1) ?4?rrt5? ?r ?f4?4r ?4a4r?l(2) ?r ?4?4?4r ?4r40? ?4?i?r ?4ar?r ?r ?4?4?4r ?4?4f q(m3) ?c ?rrr?r? ? ?t? ?4?rrt5? ?4t ?4?r ?t? ?4?t? ?4?4r ?4t? ?4?t?0 ?4t?rt? ?4l? t(h) ? ?l ?4?40r5? ?4t?0(3) t ?ra40 q ?4?4r4? ?4tr?4r? ? 4r?f ?4r4?4? ?4rt?:qt48=15(4) ?r0r? ?4?rr

14、t5? ?4t ?r 5 ?r?r ?4r4? ?t? ?r?rf? 4?4?4r ?rt?0 ?r? rr?r ?r? ?t?0 ?4a4r?l ?r ?4t 4?4?4r ?t?(5) ?r ?4?4?4r ?44r40? ?4ar?r ?r ?4?4?4r ?4?4f ?r? ?5? ?t?0 12m3?c ?a40r?r? ?rt?0 ?4?rrt5? ?4t ?r ?t? ?4?4?4r ?t?0 ?4ft? ?4a4r?l ?4l? ?4t?(6) ?0 ?4r?4r? ?4?4?40 ?4r4r ?r? ?4?40 ?rr?r? (4) ? (5)?4 ?4a4rrf r4r?

15、40 ?r?r r4i4?4a?l? ?r ?ra40 ?4?4? ?ft?.162. ?4a4?tr0 ?4rr?f r?4? ?0? () ?4r? ?44r?0 ?far? v（m3） ?4ar4r （kg/m3）?4 ?r ?4a?4r? ?rr?4r? ?t?0 ?4?40 ?4?4?f4r?. ?4?4?40 ?c?r? ?rr?r? ?4ar4r =1.1kg/m3 ?t?0 ?4r?0 ?far? v?4 ?44ff4l ?4?t.v1.985173. ?40 ? ?tat? ?4?4?4a?r ?4at? ?f4?t?i (a) ?ra40 ?tat? ?4a4?l r ()

16、 ?4?4r4? ?4r?4r? ?4?40 ?4?4?f4r?. ?4? 5 ?c?1t?r ? ?a ?4?t0:(1) ?tat? ?4?4?4a?r ?tat? ?f4?t? i (a) ?ra40 ?tat? ?4a4?l r() ?4?4r4? ?4tr?4r? ? 4r?f ?4r4?4? ?4rt?.(2) ?r0r? ?40 ?tat? ?440? rr? ?tat? ?4a4?l 5? ? ?4?4t?l ?r? ?r ?tat? ?f4?t? 1a ?rt?0 ?rrf ?0? rr? ?0 ?tat? r?4?4a?r ?r ?5? ?frt? ?10?rt? ?r?r

17、 ?4?t0.r /0i /a32?44a?: ?r0r? ? ?4?4t?l ?tat? ?f4?t? 4a?4? ?4t? ?rr4fr? ?l? ?tat? ?4a4?l r? ?r?l ?rff4l ?4r4?4? ? ?fa4l ?5r18(1) y?4 xr? ?4? ?4tr?4r? ?4r4?4? ? ?4?r? ?r?0?r0r5? ?4f x?4 ?rff4l ?4at? ?4r4?4? ?4?tyx4.?4?4?f4r? ?l?a?r? 80 m ?4tf ?4?4at? ? ?t?0 ?l14r ?l ?4a4l? ?0 ?f? ?40 ?r ?a4l ?4 ?t?05

18、 ?4aa4?r ?0 ?rl?f4r? ?4c?0 ?f4t5?180 m2 ?t?0 ?rtr ?44a4l. ?4c?0 ?f? ?tat? ?t?0 ?40 ?44?4?r ?4l?a?r? x (m)? ?i4? ?l ?t?0 rr? ?40 ?4?4?r y (m) ? r?r? ?a?14l:(2) ?0 ?4r?4r? ?4?4?40 ?4r4r(3) ?4c?0 ?f? ?tat? ?t?0 ?44?4?r ?l?a?r? ? ?44l?aa?r? ?4r? ?4?4r4?4? ?4t? ?4arrfr? ?rtr ?r44a4l ?i4? ?l ?t?0 rr? ?40

19、?4?r ?44l?a?r? ?rff4l ?4at? ?4r4?4? ?1?4t?.195.?trf ?4?a ?r?5? ?4aa4? ? ?r?0 0.8 ? ? ?a4? ?r?ra4? ? ?4f r? ?a4f ? ?a4?-?r?r ?4?. ?0 ?4? ? ?4r?0 0.400.75 ? rr4?4?4? ?r ?114? ?t?0 ?10?rt? ?4a4l? ?r0r? ? ?4r?0 x r? ?r0?r ?0 ?4? ?4?44a4? ? ?4f y (r? ?a4f ? ?a4?-?r?r) ?ra40 (x 0.4 ) (?)?4 ?r ?4a?4r? r?4r

20、? ?4a?4?4?raa4?r ?fr? x = 0.65 ?t?0 y = 0.8 ?4a?4?4t?0 ?trf ?t?0.(1) y ?ra40 x?4 ?4tr?4r? ? 4r?f ?4r4?4? ?1?4t?.(2) ?r0r? ?r? ? ?a4?-?r?r ?4? ?rr 0.3 ? ?rt?0 ? ?4r?0 ?r? ?5? ?t?0 rr?l r? ?r0?r ?tat? r?40?tt? ?44?4ar?4 ?r4? ?r?5? ?4?4?a4? %20 ?4?= ?r?ra4? ? ?4f (?4trfr? ? ?r?0 ?rr)206. ?trf ? ?r 2001-?4?a4? ?