Hello, good afternoon guys. I need a little help from you: D
1)n a positive integer.
f(x)=x(1-x)^n
Solve the equation f'(x)=0 in 0<x<1
this question I asked and found x = 1 / (x + 1) ok
2)An be the maximum value of f(x)=x(1-x)^n in [0,1]
Calculate lim (n+1)an
n tending to infinity
the...
judge whether the following expressions are larger than, smaller than or equal to zero
i) a+b+c
ii)a-b+c
iii)4a+2b+c
iv)c-e
I know that <0, b> 0, c> 0, d> 0 and e <0 but I don't know what to do
ok
i) a≤ -2 or a>0
when we calculate delta = 0, find a = -2 as the tangency point. But I saw through the graph that the system will have only one ordered pair as a solution for <= - 2 or a> 0
ii) a=0
iii)-2<a<0
iv) does not exist
solving the system we find x²-ax-a-1=0
∆ = (-a)² - 4.1.(-...
hello, thanks for answering
i) a≤ -1 or a>0 * a=-1asymptote
ii) a=0
iii)-1<a<0
iv) does not existI can see it by looking at the graph, but how can I prove it algebraically?
Good night!
How do I find the values of a (real) so that the solution of this system is?
(i) just an ordered pair?
(ii) exactly two pairs.
(iii) exactly 3?
(iv) is there a place where you have more than 3 pairs as an answer?So...
I thought like this: I developed the first part. I solved the...
Thanks!
to end the question has an item c...
c)
Calculate the percentage of error observed |q-r| in relation to an actual quantity sold each
month.
From there, your opinion on the quality of this estimate.
So, I would like to be sure of what I did.
percentage error = E/r
what does your...
it's clearing up a little bit. I can leave | q-3000 | ≤500 because so 2500≤q≤3500. That is E = 500 ?
p
q
r
r-q
|r-q|
3
3500
3250
-250
250
3,2
3400
3570
170
170
3,5
3250
3100
-150
150
4
3000
2890
-110
110
4,5
2750
2550
-200
200
5
2500
2500
0
0
the lowest possible value for E would be zero correct?
to end the question has an item c...
c)
Calculate the percentage of error observed |q-r| in relation to an actual quantity sold each
month.
From there, your opinion on the quality of this estimate.
So, I would like to be sure of what I...
Sorry!
The company believes that a good estimate q of the quantity sold can be given by
q = 5000 - 500p.
Give the lowest value you can for E so that |q - r | ≤ E in all observations made.
Hi, thanks for replying.
Letter Bb)
Over 6 months, several prices were tried. The following actual sales figures are observed, according to
with each price charged:
The company believes that a good estimate q of the quantity sold can be given by
Give the lowest value you can for E so that...
Homework Statement Let r be a positive constant. [/B]
Consider the cylinder x2 + y2 ≤ r2, and let C be the part of the cylinder that satisfies 0 ≤ z ≤ y.
(3) Let a be the length of the arc along the base circle of C from the point (r, 0, 0) to the point (r cos θ, r sin θ, 0) (0 ≤ θ ≤ π). Let...