the equation is:
X^2
------ + b = y
x - 4
or something like that..... based on the fact that there's a minimum extreme thing (?) when y=18?????
sorry about the lack of clarity... im translating it from hebrew as i go on...
2006-08-01 01:53:04 · 5 answers · asked by yankeegurl 4 in Education & Reference ➔ Homework Help
i checked the answer in the book, and it says that b=2, but i still dont understand how to get to that!!
2006-08-01 02:17:39 · update #1
dy/dx=2x=0 for maximum or minimum
so x=0. substituting (0/-4)+b=18 ansd so b=18
2006-08-01 02:01:59 · answer #1 · answered by raj 7 · 0⤊ 0⤋
If y=f(x) is the function which has a local minimum (the minimum extreme thing) at y=18 then the mathematical condition is:
dy/dx=0 at y=18 (and d2y/dx2>0 at y=18)
For the given function: x^2/(x-4)+b
this condition is satisfied at x=8
Now, at y=18, y=f(x)=16+b ,using x=8
Thus 16+b=18
This gives b=2
2006-08-01 09:11:26 · answer #2 · answered by Sourabh 3 · 0⤊ 0⤋
I think B = 18.
2006-08-01 09:03:15 · answer #3 · answered by akar 4 · 0⤊ 0⤋
You multply the whole equation with x-4, than you expose x (x(...)=0)and divide the whole equation with x, that is how you don't have x any more and you can solve b!!!!
2006-08-01 09:09:41 · answer #4 · answered by ne 1 · 0⤊ 0⤋
uhhhhhh show ur hebrew or math teacher if u have one
2006-08-01 08:58:12 · answer #5 · answered by Anonymous · 0⤊ 0⤋