2006-09-11 17:17:40 · 8 answers · asked by michael m 2 in Science & Mathematics ➔ Mathematics
yeah i mean -1/45x^2+2x-20=0
2006-09-11 17:24:55 · update #1
how do i plug into calculator?
2006-09-11 17:34:41 · update #2
y=-1/45x^2 +2x-20
y'=-2/45x+2
Now depending on your notation y' or dy/dx you can solve for x with respect to the y'
y'-2=-2/45x
x=-45/2(y'-2)
2006-09-11 17:21:42 · answer #1 · answered by priestlake22 2 · 0⤊ 0⤋
You mean -1/45x^2+2x-20=0 ?
derivative is-2x/45+2=0
i.e., x= 45
2006-09-11 17:22:16 · answer #2 · answered by tinor 1 · 0⤊ 0⤋
Derivative: -2/45x + 2
Answer: x=45
.
2006-09-11 17:29:21 · answer #3 · answered by Chrys 2 · 0⤊ 0⤋
dy/dx is 2/45x^3 + 2. x is minimum when x= -1/square root of 45
2006-09-11 17:21:58 · answer #4 · answered by free aung san su kyi forthwith 2 · 0⤊ 1⤋
42
2006-09-11 17:24:15 · answer #5 · answered by pwñÐönke¥ 2 · 0⤊ 0⤋
-2/45 x +2 =0
x= 45
2006-09-11 17:35:46 · answer #6 · answered by Anonymous · 0⤊ 0⤋
if by this you mean
(-1/45)x^2 - 2x - 20, then
f'(x) = (-2/45)x - 2
2006-09-11 17:34:05 · answer #7 · answered by Sherman81 6 · 0⤊ 0⤋
Michael, you must have a calculus textbook with sample problems. Just follow the examples.
2006-09-11 17:25:43 · answer #8 · answered by banjuja58 4 · 0⤊ 0⤋