Mathematics - 9 November 2007

Find the critical numbers of the function:

f(x) = x^3 + x^2 +x


(I tried it but if the quad formula gives a nonreal number, how can we find the critical numbers?)

2007-11-09 06:08:34 · 3 answers · asked by jeremy s 2

Write as an EXPONENTIAL expression...?

3 / x^2

/ is used meaning Radical sign (Square Root)

Please help!

2007-11-09 05:48:14 · 4 answers · asked by ♥ ღAngelicaღ♥ 2

2007-11-09 05:43:04 · 2 answers · asked by linthachil 1

An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle A with the plane, then the magnitude of the force is:
F= uW / ( u sinA + cosA)
where u is a positive constant and where 0 <=A<=pi/2.
Show that F is minimized when tanA =u.

Thank you!

2007-11-09 05:34:14 · 3 answers · asked by jeremy s 2

I get confused about how to do the equation 3x+y=3, would it be y=-3x+3? and what number can I use in order to plug in, can i use 0, 4, and -4. Thank you very much

2007-11-09 05:29:13 · 10 answers · asked by bug 2

Suppose X is a rational number. Can you prove that X^X is irrational unless x is an integer?

2007-11-09 05:15:26 · 2 answers · asked by Christine P 5

x^2+13x+12=0

2007-11-09 05:14:04 · 3 answers · asked by Maggie L 1

lim 13 x e^(1/x) −13 x
x -> infinity

Evaluate the limit

2007-11-09 05:08:33 · 4 answers · asked by Lauren 1

Determine the numerical form of each of the ordered pair forms in the trigonal array which follow and arrange your results in a corresponding trigonal array. (each # on top of another are in the same longer parenthesis. thanks!
(0)
(0)

(1) (1)
(0) (1)

(2) (2) (2)
(0) (1) (2)

(3) (3) (3) (3)
(0) (1) (2) (3)

(4) (4) (4) (4) (4)
(0) (1) (2) (3) (4)

(5) (5) (5) (5) (5) (5)
(0) (1) (2) (3) (4) (5)

(6) (6) (6) (6) (6) (6) (6)
(0) (1) (2) (3) (4) (5) (6)

2007-11-09 04:58:23 · 2 answers · asked by numbr1TXfan 4

-/25x^6 y^16

and YES the Negative Sign - has NO number or variable with it...

2007-11-09 04:57:51 · 4 answers · asked by ♥ ღAngelicaღ♥ 2

3x ^ 3/4

2007-11-09 04:55:55 · 3 answers · asked by ♥ ღAngelicaღ♥ 2

1a)express x^2 - 6x + 7 in the form (x+a)^2 + b, finding the values of a and b

1b) find the range of values of x for which x^2 - 6x + 7 is less than 0

2a) express x^2 + 4x -5 in the form (x+a)^2 + b, finding the values of the constants a and b

2b) find the values of x for which x^2 + 4x - 5 is greater than 0

2007-11-09 04:54:04 · 1 answers · asked by Anonymous

can you calculate lim ( ( x - sin x )/x^3 ) when x-> 3 without using McLauren series or hopital rule ?

2007-11-09 04:52:19 · 4 answers · asked by Anonymous

In a ground, N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song – one pair immediately after the other. If the total time taken for singing is 28 minutes, what is N?

2007-11-09 04:50:13 · 3 answers · asked by Anonymous

2007-11-09 04:31:49 · 11 answers · asked by Anonymous

My math teacher once told me that someone somewhere was able to prove that 1 + 1 = 3, now this doesn't make any sense to me but what if it someone did prove it? Is it true? Is so who did?...I would ask for the formula but I think it would just be too complicated for my little brain...

2007-11-09 04:27:42 · 6 answers · asked by Anonymous

2007-11-09 04:10:10 · 2 answers · asked by beastiegirl 2

I have answered the first 7 questions but I am confused on this one.
Evaluate the indefinite integral (arctan(2x)) / (1+4x^2)

which one do I substitute u for.

2007-11-09 04:06:59 · 4 answers · asked by Smokey. 6

Can someone help me solve this problem?

Gregg Reid of Atlanta, Georgia, built a motorcycle that is over 4.5 m long and has a mass of 235 kg. The force that holds Reid and his motorcycle in a circular path with a radius of 27.9 m is 1850 N. What is Reid's tangential speed? Assume Reid's mass is 84 kg.

2007-11-09 04:05:11 · 2 answers · asked by Anonymous

The four sides of a rhombus measures as follows.
138; 180; 155; 197; All in feet--- Can any one work out the area and help me.

2007-11-09 03:55:26 · 3 answers · asked by sunsuk42 1

2007-11-09 03:53:51 · 6 answers · asked by Anonymous

10x+2y=7
y=-5x+3

2007-11-09 03:53:49 · 3 answers · asked by Boogie 2

This is a question my 7th grader has and we have no clue what the answer is please help.

2007-11-09 03:47:30 · 5 answers · asked by czalinsky 1

a. 16/7
b. 16
c. -12
d. does not exist

2007-11-09 03:37:58 · 2 answers · asked by Hollywood614 2

Could you please help me prove this?

Let (X, M, m) be a mesure space and let E_n be a sequence of sets in M such that Sum (n=1, oo) m(E_n) < oo. Show that almost every x of X belongs to finitely many sets E_n.

2007-11-09 03:33:58 · 4 answers · asked by Tania 1

find the area of the region that lies in both

r= a(1+cos@) and r = a sin @

@ = theta sign

2007-11-09 03:28:43 · 2 answers · asked by !z@@h. (はりざ ) 4

Years after the famous foot race, the hare challenged the tortoise to a rematch on bicycles. The hare was able to pedal at a rate of 15 miles per hour (mph), while the tortoise could pedal only at a rate of 12mph. Knowing he was slower, the tortoise makes up a lame excuse for being given a 27-mile head start in the 165-mile race.

What is the largest head start the tortoise could have been given without being able to beat the hare? Explain.

2007-11-09 03:01:39 · 7 answers · asked by . 1

Show that (n)1/2 is irrational if n is positive integer that is not aperfect square.

2007-11-09 03:00:04 · 4 answers · asked by sirf _tum 1

Can anyone help me with this problem? Solve the system by addition.
4x – 6y = –1
8x + 3y = 3

2007-11-09 02:57:05 · 5 answers · asked by smiles4u 3

can someone please show me how to get the real zeros, there should be four i think, i am not just not sure how to get there??

2007-11-09 02:49:24 · 4 answers · asked by Anonymous