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👨🏻‍🏫 學術台數學

yau

2007-12-02 6:45 pm

一條數=}不過有兩個unknow
教下我``

2y=y(1+Nx5%)

搵N

回答 (5)

用戶36732

2007-12-02 7:04 pm

✔ 最佳答案

2y=y(1+Nx5%)

(2y)/y=1+Nx5% <哩度除個ｙ過去，ｙ可化簡

2=1+Nx5%　<抵消了ｙ，接下來很易計...

1=Nx5%

N=20

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am4b108

2007-12-02 8:59 pm

2y=y(1+Nx5%)
2(除y)=1+Nx5%)(除y)
1(減1)=Nx5%(減1)
1/5%=N
N=20

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ok pan

2007-12-02 8:28 pm

2y=y(1+Nx5%)
2=1+Nx5% (個unknow 約左)
1=Nx5%
100%=Nx5% (1=100%)
N=20 (冇單位)

參考: me

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[匿名]

2007-12-02 8:10 pm

easy la

2y=y(1+5%N)

2y/y=1+5%N

2-1=5%N

1=5%N

1x5/100=N

20=N

N=20

參考: me

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wai kit

2007-12-02 6:50 pm

2y=y(1+Nx5%)
2=1+Nx5%
1=Nx5%
N=20

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