b) hence solve the equation.
(4/√x-3)+5√x-3=12
1a個題我計到ans 係x=2,or 2=2/5
係b個題唔識做
help!!詳細pls!!
更新1:
這equation 是 這樣(4/√x-3)+5(√x-3)=12,
1題F.4數學題唔識做 高手請!!
2008-09-27 7:41 am
1.a)solve the equation 4/y+5y=12
b) hence solve the equation.
(4/√x-3)+5√x-3=12
1a個題我計到ans 係x=2,or 2=2/5
係b個題唔識做
help!!詳細pls!!
b) hence solve the equation.
(4/√x-3)+5√x-3=12
1a個題我計到ans 係x=2,or 2=2/5
係b個題唔識做
help!!詳細pls!!
回答 (2)
2008-09-27 3:09 pm
✔ 最佳答案
1.4/y + 5y - 12 = 0
5y^2 - 12y + 4 = 0
(5y - 2)( y -2) = 0
y =2/5 and 2.
2.
Put sqrt ( x -3) = 2
x - 3 = 4
x = 7.
Put sqrt (x - 2) = 2/5
x - 3 = 4/25
x = 4/25 + 3 = 79/25.
2008-09-27 9:54 am
想知這equation 是 這樣(4/√x-3)+5(√x-3)=12, 還是 (4/√x-3)+5(√x) -3=12 呢？
收錄日期: 2021-04-25 22:35:35
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