1. Make a the subject of the formua a+b= ab
2. Make R the subject of the formula S= a / 1-R
3. Make a the subject of the formula t² - at + a +1 = 0
4. Make v the subject of the formula 1/f = 1/u + 1/v
plz teach me how to do thx so much!
F.2 maths
2008-10-18 5:22 am
回答 (2)
2008-10-18 5:54 am
✔ 最佳答案
1. a+b = abb = a(b-1)
a = b/(b-1)
2. S = a / (1-R)
S(1-R) = a
1-R = a/S
R = 1-a/S
3. t² - at + a +1 = 0
t² - a(t-1) + 1 = 0
a(t-1) = t² + 1
a = (t² + 1) / (t-1)
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)
參考: 自己做
2008-10-18 6:52 am
1.
a+b = ab
b = a(b-1)
a = b/(b-1)
2.
S = a / (1-R)
S(1-R) = a
1-R = a/S
R = 1-a/S
3.
t² - at + a +1 = 0
t² - a(t-1) + 1 = 0
a(t-1) = t² + 1
a = (t² + 1) / (t-1)
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)
Hope I can help you.
a+b = ab
b = a(b-1)
a = b/(b-1)
2.
S = a / (1-R)
S(1-R) = a
1-R = a/S
R = 1-a/S
3.
t² - at + a +1 = 0
t² - a(t-1) + 1 = 0
a(t-1) = t² + 1
a = (t² + 1) / (t-1)
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)
Hope I can help you.
參考: my maths knowledge
收錄日期: 2021-04-15 17:21:57
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