1.s=u(1-u)+2ut 主項轉做u
2.r=s over t-2t 主項轉做s
唔該俾埋條式
主項變換(10分)
2007-09-30 2:39 am
回答 (2)
2007-09-30 3:02 am
s=u(1-u)+2ut
s=u-u^2+2ut
s=u(1-u+2t)
s÷(1-u+2t)=u
u=s over (1-u+2t)
r=s over t-2t
r(t-2t )=s
s=rt-2rt
s= -rt
s=u-u^2+2ut
s=u(1-u+2t)
s÷(1-u+2t)=u
u=s over (1-u+2t)
r=s over t-2t
r(t-2t )=s
s=rt-2rt
s= -rt
2007-09-30 3:01 am
1.s = u(1﹣u)+2ut
s = u﹣uv+2ut
s = u(1﹣v+2t)
s/(1﹣v+2t) = u
u = s/(1﹣v+2t)
2.r = s/t﹣2t [s]
r+2t = s/t
t(r+2t) = s
s = t(r+2t)
s = u﹣uv+2ut
s = u(1﹣v+2t)
s/(1﹣v+2t) = u
u = s/(1﹣v+2t)
2.r = s/t﹣2t [s]
r+2t = s/t
t(r+2t) = s
s = t(r+2t)
收錄日期: 2021-04-18 23:28:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070929000051KK03912