Mathematics - 16 July 2007

Calculus question: Solving for absolute minimum and absolute maximum?
For the value of f(x) = x/(x^2 +1) on the given interval [0,2]

f'(x) = (x^2 + 1 - 2x^2) / (x^2 + 1)^2

did I find the derivative correctly??? and now what do I do to set it to zero. I am totally confused !!! HELP!! Thanks




Could you show me how to solve for the +/- 1 by eliminating the denominator. Once I have that I can solve for the min. and max. ...it's the algebra that driving me crazy!!! Thanks!!

2007-07-16 12:49:39 · 3 answers · asked by Anonymous

m+2/5=1/2

2007-07-16 12:37:16 · 10 answers · asked by Lindsay 3

2007-07-16 12:22:19 · 4 answers · asked by beeboppinbippity 1

2007-07-16 12:20:11 · 10 answers · asked by ra1ndanser 2

x + y + z = 5
2x - 3z = 7
3x - y + z = 1

2007-07-16 12:12:01 · 3 answers · asked by *05* 1

For problems 11 through 13, a projectile is fired upward with an initial speed of 800 feet per second. It is given that

h=-16t^2+800
(h= height of the ball)

11. factor the equation
a. h=t(-16t+800)
b. h=(-16t)(t-50)
c. h=(-16)(t^2+50t)

i put a as my answer but i dont know if it is right.

12. What will you set h equal to in the equation to find how many seconds it takes for the projectile to hit the ground?

a. h=0
b. h=1

13. Use your graphing calculator to find how many seconds before the projectile hits the ground. Let y1=.16t^2+800t , or factor and solve for t algebraically.

a. 0 seconds
b. 50 seconds

please explain this to me. i am not very good with word problems. i would really REALLY REALLY appreciate it!

thank you!

:]

2007-07-16 12:05:49 · 4 answers · asked by Anonymous

how would I calculate the Grade given a distance, a starting height, and an ending height

2007-07-16 11:53:15 · 3 answers · asked by agill15806 2

If the equation is an identity or if it has no solution, write identity or no solution. solve each equation.

1. 3x=27-15x

2. 39c+78=33c

3. 7(2-m)=3m

2007-07-16 11:48:53 · 3 answers · asked by ☮ 4

The figure formed is a parallelogram.

2007-07-16 11:47:47 · 3 answers · asked by CPUcate 6

For the value of f(x) = x/(x^2 +1) on the given interval [0,2]

f'(x) = (x^2 + 1 - 2x^2) / (x^2 + 1)^2

did I find the derivative correctly??? and now what do I do to set it to zero. I am totally confused !!! HELP!! Thanks

2007-07-16 11:47:32 · 1 answers · asked by Anonymous

How many onces of each must he take to make 75 onces of an alloy which shall be 72 % pure gold?

2007-07-16 11:41:43 · 5 answers · asked by CPUcate 6

2007-07-16 11:35:49 · 3 answers · asked by CPUcate 6

2007-07-16 11:34:43 · 11 answers · asked by jaredlferris 1

2007-07-16 11:32:33 · 3 answers · asked by CPUcate 6

2007-07-16 11:29:46 · 10 answers · asked by CPUcate 6

8. Here is the problem…..Determine the rational function R(x) has a graph that crosses the x-axis at -1, touches the x-axis at -4, has vertical asymptotes at x=-2 and x=3, and has one horizontal asymptote at y=-2……

Is this the answer? R(x)=(-2(x+1)(x+4))/(x+2)(x-3)

2007-07-16 11:21:03 · 3 answers · asked by Anonymous

same radio at $80 less 30%. What is the offer and how much?

2007-07-16 11:18:23 · 2 answers · asked by CPUcate 6

Six missiles are positioned at each of the six vertices of regular hexagon ABCDEF. Each side of ABCDEF is one mile in length. The missiles take off simultaneously, each one always heading directly toward the missile in front of it -- the missile starting at point A always heads toward the missile starting at point B, etc.

The missiles clearly follow a spiral pattern. Do the missiles simultaneously meet in the center, or do they spiral away from each other? If they meet in the center, how far does each missile travel?

2007-07-16 11:11:46 · 7 answers · asked by Anonymous

If it should win 62 1/2 % of the game to be played, what would be its standing at the close of the season.

2007-07-16 11:11:20 · 3 answers · asked by CPUcate 6

2007-07-16 11:02:37 · 4 answers · asked by Tman # 4 1

1. If m^15 = 48 over y and m ^13 = 2 over 6y and m > 0, what is the value of m?

2. If 1 over 4 of an even positive # and 5 over 6 of the next larger even # have a sum of 32, what is the average of the 2 #'s?

I posted this question before and I got this answer: Just wondering if anyone could explain how to get the 91 over 3.

(1/4)(x)+(5/6)(x+2)=32

(13/12)x=91/3

x=28
x+2=30

Avg: 29

Thank you. I appreciate any steps.reasoning shown :].

2007-07-16 10:29:33 · 5 answers · asked by RuleOfTheRose 2

integral of (lnx)/((x^(3/2))

I tried let u= lnx and x^(3/2) and it didn't work.

2007-07-16 10:26:14 · 3 answers · asked by jessica y 1

2007-07-16 10:14:11 · 11 answers · asked by sharri 1

2007-07-16 10:02:59 · 16 answers · asked by beata123me 1

I am making a large invoice. Qty x Unit Price = total price.
I am having to put in a formula for each line (A4*F4) (A5*B6) (A6*F6), etc.... This will be time consuming if I want 100 lines. Is there a way to do this more quickly than one formula at a time for each line?

2007-07-16 09:50:15 · 8 answers · asked by pikachuflatulates 5

Alana made Super Juice, using a blender. She put in 75 more strawberries than bananas. She put in 1/3 times as many bananas as oranges and 47 more oranges than apples. The number of apples equal 5 more than twice as many pineapples. She put in 4 pineapples. How many of each fruit Alana used?

Could u show work please thanks again!!

2007-07-16 09:44:10 · 4 answers · asked by star-best 1

can you help me please.
this is the picture of this question.
http://aycu22.webshots.com/image/19941/2004940472011085018_rs.jpg

2007-07-16 09:04:16 · 3 answers · asked by Anonymous

is given by T(t) = -.1t^2+1.2t+98; for 0 less than or equal to t, less than or equal to 12. Where T is tempt at time t, in days, find the mad value of the temp and when it occurs

what?

2007-07-16 09:01:38 · 3 answers · asked by alfreddood 1

http://m1.freeshare.us/159fs376072.gif

x^4-(3m+2)x^2+m^2=0

2007-07-16 09:00:48 · 1 answers · asked by Amir 1

1-(1/4)+(1/7)-(1/10)+(1/13)-...

2007-07-16 08:57:20 · 4 answers · asked by Amir 1