Ask me math

Since you spell maths with an 's', are you British?

mathsandeconomics — Wed, 22 May 2013 12:30:25 -0400

doers it matters?

(x^2.y^-2/5)^-4

mathsandeconomics — Sat, 18 May 2013 12:49:40 -0400

classic binomial expansion

(a+b)^n form

http://www.haverford.edu/physics/MathAppendices/Binomial_Expansions.pdf

Is 4/9 greater than 1/3?

mathsandeconomics — Sat, 18 May 2013 12:47:17 -0400

that is where lcm comes handy

lcm of 9 and 3 is 9

multiply it to both the numbers

4/9 *9 = 4

1/3*9 = 3

so 4/9 is greater

can u give me the solution for - the value of cube root of 64 raised to the power of -2 cube root...

Sun, 12 May 2013 07:59:21 -0400

can u give me the solution for -

the value of cube root of 64 raised to the power of -2

cube root of 64 is 4

4 raised to power to -2 = 1/16

thanks. b would be 2/3x or just 2/3 without the x?

mathsandeconomics — Wed, 08 May 2013 12:27:18 -0400

2/3x

I don't understand how you could expand (1+2/3x)^n if you don't have the value of n. Even if I do plug in the formula (a^n+(n,1) a^n-1b) How do I get n alone?

mathsandeconomics — Wed, 08 May 2013 12:22:42 -0400

http://www.regentsprep.org/Regents/math/algtrig/ATP4/bintheorem.htm

check this out

please help, im clueless about this. I know this has something...

emeraldbeaches — Wed, 08 May 2013 12:16:48 -0400

please help, im clueless about this. I know this has something to do with binomial expansion and I expanded 3+nx^2 but that’s all I have done.

also expand (1+2/3x)^n

by the formula of binomial expansion

multiply constant terms and equate it to 9 of r.h.s.

multiply and get the terms containing x, and equate it to 84x

you will get value of n

range of 1/3-cos4x cos 4x max value is +1 so 1/3-1=-2/3 cos 4x min value is -1 so 1/3+1=4/3 so range...

Wed, 08 May 2013 12:09:08 -0400

range of 1/3-cos4x

cos 4x max value is +1

so 1/3-1=-2/3

cos 4x min value is -1

so 1/3+1=4/3

so range is

albruce-jzcruzer-captainx: I Wonder What Gang He Was In?

mathsandeconomics — Wed, 08 May 2013 11:29:20 -0400

albruce-jzcruzer-captainx:

I Wonder What Gang He Was In?

vendittelli: Don’t just read it; fight it! Ask your own...

mathsandeconomics — Wed, 08 May 2013 11:25:21 -0400

vendittelli:

Don’t just read it; fight it! Ask your own questions,
look for your own examples, discover your own proofs.
Is the hypothesis necessary? Is the converse true?
What happens in the classical special case? What
about the degenerate cases? Where does the proof
use the hypothesis?

—- Paul R. Halmos [x]

yeah

darkeningofheart: askmemathsquestions: darkeningofheart: askme...

mathsandeconomics — Wed, 08 May 2013 11:21:11 -0400

darkeningofheart:

askmemathsquestions:

darkeningofheart:

askmemathsquestions:

Hi can you please explain this to me? I used the double angle formulae but I can’t seem to get past substituting 2cosx for sin2x

2cosx = 2sinxcosx

or cosx-sinxcosx = 0

or cosx(1-sinx)=0

or

cosx=0 or sinx =1

find the values of x in the interval given above, and you will get your answers.

What happened to the 2’s before cosx and sinx?

2 got canceled out.

Did they get cancelled out by dividing or subtracting? Can you separate them from cosx and sinx?

yes

they got divided and cancelled out

its like 2* a = 2*b

a being cos x and b being sinx cosx just for example

what will you get?

2 cancels out, and you get, a=b

What is the least positive integer n such that1 + 2 + … + n > 999 40 45 50 55 Thanch...

washidays — Wed, 08 May 2013 11:08:43 -0400

What is the least positive integer n such that

1 + 2 + … + n > 999

Thanch you!

sum to n natural numbers is

n(n+1)/2

given

n(n+1)/2 >999

solve this inequality

I think the answer is 44

darkeningofheart: askmemathsquestions: Hi can you please...

mathsandeconomics — Tue, 07 May 2013 22:10:53 -0400

darkeningofheart:

askmemathsquestions:

Hi can you please explain this to me? I used the double angle formulae but I can’t seem to get past substituting 2cosx for sin2x

2cosx = 2sinxcosx

or cosx-sinxcosx = 0

or cosx(1-sinx)=0

or

cosx=0 or sinx =1

find the values of x in the interval given above, and you will get your answers.

What happened to the 2’s before cosx and sinx?

2 got canceled out.

Hi can you please explain this to me? I used the double angle...

emeraldbeaches — Tue, 07 May 2013 13:55:17 -0400

Hi can you please explain this to me? I used the double angle formulae but I can’t seem to get past substituting 2cosx for sin2x

2cosx = 2sinxcosx

or cosx-sinxcosx = 0

or cosx(1-sinx)=0

cosx=0 or sinx =1

find the values of x in the interval given above, and you will get your answers.

are you online right now? o:

mathsandeconomics — Tue, 07 May 2013 00:54:44 -0400

not if you are taking a math test

If i have 12,312 grams and each gram is worth 30 dollars how much money would I have !Please awnser soon very urgent!

mathsandeconomics — Fri, 03 May 2013 11:43:00 -0400

12,312 * 30

is your answer

If pi is irrational then how is22/7is rational?

mathsandeconomics — Tue, 30 Apr 2013 23:23:17 -0400

22/7 is just an approximation of pi, not exact value.

2radical3: live on tea and flowers.try not to worry what will be on the final

2radical3 — Tue, 30 Apr 2013 23:00:53 -0400

2radical3:

live on tea and flowers.
try not to worry what will be on the final

so if 200/x = 200x^-1 THEN.. what does x^2/110 equal???

mathsandeconomics — Fri, 26 Apr 2013 13:25:36 -0400

200/x = 200 *x^-1=200/x

you wrote an identity dude

lolalyu: One of my favorite quote ever.

mathsandeconomics — Fri, 26 Apr 2013 03:25:06 -0400

lolalyu:

One of my favorite quote ever.