plz help me to answer the question,if you do not know the answer,plz answerno.I need the step.Thank for your help~
1)Make a the subject of the formula a+b=ab.
2)Make R the subject of the formula S=a/1-R.
3)Make a the subject of the formula t^2-at+a+1=0.
4)Make v the subject of the formula 1/f=1/u+1/v.
MATHZ(F.2)
2007-09-30 1:53 am
回答 (2)
2007-09-30 2:02 am
✔ 最佳答案
1.a+B=aba=ab-B
a-ab=-B
a(1-b)=-B
a=-B/(1-b)
2.S=a/1-R
S-SR=a
S-a=SR
S-a/S=R
3.t^2-at+a+1=0
t^2+1=at-a
t^2+1=a(t-1)
t^2+1/(t-1)=a
4.1/f=1/u+1/v
1/f-1/u=1/v
v(1/f-1/u)=1
v=1/(1/f-1/u)
2007-09-30 2:02 am
a+b=ab
a-ab=-b
a(1-b)=-b
a=-b/(1-b)
S(1-R)=a
R=1-a/S
a(1-t)=-t^2-1
a=(-t^2-1)/(1-t)
1/f-1/u=1/v
(u-f)/fu=1/v
v=fu/(u-f)
a-ab=-b
a(1-b)=-b
a=-b/(1-b)
S(1-R)=a
R=1-a/S
a(1-t)=-t^2-1
a=(-t^2-1)/(1-t)
1/f-1/u=1/v
(u-f)/fu=1/v
v=fu/(u-f)
參考: ME
收錄日期: 2021-04-13 13:40:30
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