Mathematics - 20 August 2007

I know the summation notation operator is Σ; but how do you use it to find the sum of a series?

2007-08-20 09:26:44 · 3 answers · asked by Tim B 3

my guess is 2 and 4, but i could be wrong.

2007-08-20 09:26:07 · 1 answers · asked by Cat 3

2007-08-20 09:13:54 · 7 answers · asked by hernanleiva 1

solve and check equation. Use the domain rational number?
please help me out..

2007-08-20 09:11:39 · 3 answers · asked by Anonymous

thank you!

2007-08-20 09:08:16 · 4 answers · asked by yeahxitsxsarah 2

yet its a pretty simple number 2 divide by 2 isnt it? try it on some people c how they do,
maybe im just asking people that arnt good at math

2007-08-20 08:41:42 · 11 answers · asked by Anonymous

I am trying to solve a puzzle and I need to write equations for a horizontal and a vertical lines passing through (5, -4) that state the slope- how would I do that?

2007-08-20 08:32:48 · 4 answers · asked by Anonymous

2007-08-20 08:26:50 · 9 answers · asked by angel 1

2007-08-20 08:18:47 · 14 answers · asked by angel 1

Find an example of a real-life problem that involves exponents. State the problem. Explain how you would try to solve the problem. Use a problem that is different from everyone else's own

2007-08-20 08:09:30 · 2 answers · asked by shellyeph 1

A student submits homework in which she writes:3 exponent is 2 x 3 exponent is 3 = 729 and(-3) exponent 2 = -9. What doyou think she did wrong, if anything? What would you advise her to do?

2007-08-20 08:09:05 · 2 answers · asked by shellyeph 1

2007-08-20 08:02:09 · 5 answers · asked by matt r 1

This question was inspired by the one at http://answers.yahoo.com/question/index;_ylt=ApfyiAkLxa3nBMvRv5dBST3sy6IX?qid=20070816104652AAunj7P

For x >=0, let f(x) = lim [1/1^x ....+1/n^x - Integral (1 to oo) dt/t^x]. Then f(x) = lim [1/1^x ....+1/n^x - (n^(1-x) -1)/(1 -x)], if x<>1, and f(1) = lim [1/1 ....+1/n - ln(n)] , so that f(1) is the Euler/Mascheroni constant. Since the function u --> 1/u^x is strictly decreasing for x>0, the limit of the sequence always exist and f is well defined. For x >1, 1- x <0, both the series and the integral converge and we have f(x) =lim [1/1^x ....+1/n^x - 1/(x -1)] = Z(x) - 1/(x -1), where Z is the Riemann Zeta function. We know Z is analytic on the complex plane, so has derivatives of all orders on (1, oo). Therefore, , f has derivatives of all orders on this set and f'(x) = Z'(x) + 1/(x-1)^2. But I couldn't conclude if f is differentiable, or at least continuous, on [0,1].

2007-08-20 07:59:41 · 1 answers · asked by Steiner 7

+5- -6=?
-6 - +5=?

2007-08-20 07:52:05 · 6 answers · asked by Anonymous

2007-08-20 07:51:17 · 21 answers · asked by angel 1

i did this a longgg time ago and i totallly for got can someone explain or give me a website to solve these three problems?
1.y=-x - 2
y=x+6

2.x-y=1
x-y=3

3.-x+5y=5
2x+y=4

2007-08-20 07:51:02 · 2 answers · asked by lasfklaf; 1

2007-08-20 07:48:07 · 1 answers · asked by Anonymous

Now that I get the funny anti-derivative part, (Muchas muchas gracias to Sean and MathGuy for that!), the answer I have to this problem is as follows:

The area between
y = sin(pi times x) and
y = x^2-x, x=2

is (4/pi) + 1 ....right?

Please show your work, if you don't mind! Thanks.

2007-08-20 07:47:02 · 2 answers · asked by litestim 2

and can u please show the formula for solving this equation? it's been so long since i've had algebra, and guess what...i work in accounts reveivables (but i'm no accountant, entry level position, lol).

2007-08-20 07:36:39 · 5 answers · asked by duped4thelasttime 3

2007-08-20 07:26:29 · 4 answers · asked by Anonymous

I apparently missed a BIG part of the Trig basics. I have to find values for example of Sin(375degrees) using things like 3/4 + 1/4 or sqrt3/4 - sqrt3/4, etc. I have no idea how to do this. I have a lot of these and an answer bank. I think if I can get on the right track I can do it!
Thanks.

2007-08-20 07:23:30 · 2 answers · asked by Anonymous

2007-08-20 07:20:24 · 10 answers · asked by lasfklaf; 1

How many distinct complex integers (n + im) divide 4 + 0i, so that

4 + 0i = (n + mi)(k+li), and
all n,m,k,l are integer.

2007-08-20 07:11:12 · 2 answers · asked by Alexander 6

2007-08-20 07:02:22 · 10 answers · asked by lang1323 2

The wide U shape looks like a half circle and the sideways 8 looks like an 8 laying on its side (i'm sorry that do not know how to show one on a computer).

2007-08-20 06:56:59 · 9 answers · asked by Anonymous

thanksmucho

2007-08-20 06:54:45 · 6 answers · asked by lasfklaf; 1

The demand equation for a certain type of printer is given by
D = -200p + 35,000
The supply equation is predicted to be
S = -p^2 + 400p – 20,000
Find the equilibrium price:

This is what I have come up with but I don't know which one is the right price:

D = S , solve for p

-200p + 35,000 = -p^2 + 400p – 20,000

p^2 - 600p + 15,000 = 0

p = 112.92
p = 487.08

Which one is the equilibrium price??

2007-08-20 06:50:38 · 5 answers · asked by casper5 3

slope intercept form

2007-08-20 06:47:38 · 5 answers · asked by B. 5

what is x?

2007-08-20 06:45:09 · 7 answers · asked by lang1323 2

2007-08-20 06:41:39 · 3 answers · asked by jessie0420 2