請問 3= 0.8n + 1.8√2n0.8*0.2 可以什樣化簡?

👨🏻‍🏫 學術台數學

ChanKa hei

2017-01-08 12:40 am

回答 (1)

2017-01-08 10:42 am

3=
0.8n + 9/2*4/5*1/5*sqrt(2)*n=
0.8n + 18sqrt(2)/25*n

n(0.8+0.72sqrt(2))=3
n = 1.6499528596922512737188700713028...

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