13ʽʱгвڡĻϢǣ
aǿʽЧгbǿʽЧгcʽЧгdЧг
ȷ:a
:ǿʽЧгϣÿһλ߶йʱƷϢÿһλռеϢһģ˵ǿʽЧгϲڡĻϢ
14ijͶĿnpv>0npvr>0pi>irr>icpp>n/2Զ϶Ŀ
a߱bȫ߱
c߱dȫ߱
ȷ:a
:μ̲250ҳ
15ij˾ijŵйΪ50000ԪƷı䶯ɱͱ䶯۷30000Ԫɿع̶ӷ2500Ԫɿع̶ӷ3000ԪĹ˾Ϊ1500Ԫôòŵĸ˿ɿΪ
a20000Ԫb17500Ԫc14500Ԫd10750Ԫ
ȷ:b
:ĸ˿ɿ룭䶯ɱɿع̶ɱ5000030000250017500Ԫ
16ijҵ꣨19982002꣩ĩȨֱΪ1500Ԫ1700Ԫ6800Ԫ9900Ԫ13600Ԫҵ2002ʱƽΪ
a100b397c128d68
ȷ:a
:ʱƽʣĩȨ/ǰȨ棩1/31
17ij˾˰Ϊ1000ԪƻͶʽ600Ԫ˾ĿʽṹΪʽռ60ʽռ40ʣߵҪ˾Ͷ߷ֺΪԪ
a640b400c600d560
ȷ:a
:1000600×60640Ԫ
ʣ£Ͷ߷ֺ˰ƻͶʽ×Ŀʽṹʽռı
18ֱ־߽Ԥǣ
a־ԤbճҵԤcԤdԤ
ȷ:a
:ֱ־߽Ԥ־Ԥ㡣ȫԤԻҼʽӳйҵδһڼȫӪжƻӦʩ˵־Ԥ㡢ճԤͲԤ㡣ԤϵеDzԤ㣬ֳԤ?
19ijͶĵʵ10000ԪͶʶΪ50000ԪԤ͵ͶΪ12ĵʣΪ
a4000b5000c1200d600
ȷ:a
:1000050000×124000Ԫ
ʣ棽Ͷʶ×涨ԤڵͶʱʡ
20Űϵĺıǣ
aʲbʲcȨd
ȷ:b
:ŰϵĺıʽʡŰϵָҪУʽʡʲʡ۾ʡʲתʡȨ
21ij40Ԫļ۸һŹƱùƱĿǰĹΪÿ1Ԫ2һ50Ԫļ۸ۣùƱͶӦΪ
a2b20c21d27.55
ȷ:d
:ڶڳУԿɲʱֵƱʰԤڹʺԤʱʣkd1s1s0÷s0k1×125040÷4027.55
22ȫԤϵеڣΪ
aʱ֧ԤbԤcԤdֱӹԤ
ȷ:c
:ȫԤϵеDzԤ㣬ֳԤ㡣
ȫԤԻҼʽӳйҵδһڼȫӪĿжƻӦʩ˵־Ԥ㡢ճҵԤͲԤ㡣ֱ־߽Ԥ־Ԥ㡣
23ijУѧִһֽԤԺڵÿĩ֧ȡϢ2000ԪڴΪ8£Ӧ()Ԫ
a25000b20000c21600d22500
ȷ:a
:Ӧ=2000÷8=25000(Ԫ)
24ϵͳ()
aڹ㷺ľƺ¼bijһͶҵеľػ¼
cͨǻͶʵԷɢdͨԦϵк
ȷ:b
:ϵͳǹ˾зգܹͨǻͶʷɢϵֻܺϵͳյĴСϵͳա
25ij˾ʽܶΪ1000ԪծΪ40ծϢΪ10깫˾ʵϢ˰ǰΪ150Ԫ˾ÿ껹֧6.7Ԫȹɹ˰33ù˾IJܸϵΪ()
a3b2.5c1.5d0.5
ȷ:c
:ܸϵ=