Mathematics - 23 July 2006

2006-07-23 23:58:56 · 7 answers · asked by RADCLIFE K 1

Given a function of f(n) = nCr, where r is a constant,
example like, r=3, then f(6) = 6C3

How to get the differentiate of the function, ie f'(n)?

I think because nCr = n!/[(n-r)!r!],
and n! is differentiable by using gamma function, differentiate nCr is possible. But I can't even confirm whether I do it right on differentiate on n!, I got stuck on differentiate nCr.

Anybody could help me on this?

2006-07-23 23:45:17 · 6 answers · asked by wyeechen 2

I admit, I really blow at math. Please help me out and work these problems out for me. Pretty please? Thanks.

Given that jmx=1/dq, solve for d

Given that 1=q/asuz, solve for s

Given that 1/y=1/bhjz. solve for j.


solve for x

13/9=4/3x + 9/27

13/28 = 6/4x + 20/16

6/x = 84/48 - 46/36

23/42 = 41/24 + 13/5x

13/24 = 54/32 + 6/2x

2006-07-23 23:26:45 · 6 answers · asked by auf_acshe 1

sinx cosx = sinx + cosx - 1

2006-07-23 23:23:31 · 7 answers · asked by Smart M 2

2006-07-23 22:46:41 · 9 answers · asked by Anonymous

im doing a maths test tomoz and id really like to know how to work out in maths percentages and how to do fractions please help as im finding them difficult

2006-07-23 21:27:26 · 11 answers · asked by barbie doll 1

I am a B.Sc student willing to do a PROJECT in STATISTICS. I am confused in choosing the TOPIC of my PROJECT. It must based on PRACTICAL ISSUES that takes a time span of less than a month to accomplish. I need the guidance in selecting the SUITABLE ISSUES which include CREATIVITY, HARD WORK, ADVENTURE and ofcourse A MEANINGFUL OUTPUT.

2006-07-23 20:45:35 · 11 answers · asked by koolekatti 1

I see mathematics in fluid state.
The ideas are merging one in each other.
It's not only a collection of propositions and theorems.
You can look to some result from a multitude of points of view.
Thanks

2006-07-23 20:31:46 · 6 answers · asked by Theta40 7

2006-07-23 20:31:25 · 7 answers · asked by guru 1

2006-07-23 19:41:29 · 13 answers · asked by Anonymous

i dont actually want to kno the answer to this question cuz i kno how to solve it and want to solve it myself (not much of a cheater) all i need to kno is when it asks this does it want the average value of the integral or does it want the slope of the secant line of the function

2006-07-23 18:57:52 · 5 answers · asked by Anonymous

which is greater either the sum of all the brod mans first class matches scores or product of sachin tendulkars onday internationals scores

2006-07-23 18:54:37 · 1 answers · asked by ninja_14u 1

there are hundreds of papers and millions of numbers and formulas on them. My siblings and I can't seem to toss them out, we are puzzled! Before he died he told me that he was sorry he couldn't solve the formula for us, but keep in my that he was delirious from all the morphine (end stage metastatic bladder cancer). The numbers were written way before the cancer. Also he was a computer engineer for years and worked on a project for NASA through the company worked for, so he was a pretty smart guy.

2006-07-23 18:49:25 · 11 answers · asked by not_in_it_4_love 2

Three dive buddies were driving to a dive site and stopped at a motel for the night. The room rate was $30, so they each paid $10 and went up to the room. While getting some ice, one of the buddies met the person from the next room and found out that he had paid only $25.
When he told his buddies, they decided to call the manager to find out why they had paid $30. The manager admitted the mistake and gave the bellhop $5 to give back to the divers. The bellhop said to himself: How can I split $5 between 3 guys? I will give each of them $1 and keep $2 for myself! Which he did.
So now the divers had paid $9 each ($10 less $1 they got back). 3 x $9 = $27. Plus $2 the bellhop kept = $29. What happened to the other dollar?

2006-07-23 18:10:39 · 8 answers · asked by dhampton82 2

no this is NOT homework for the UMPTEENTH time...i'm studying for the ACT and Math is NOT my strongpoint...my sister told me to use Yahoo!Answers yesterday and it seems to be working for me.

2006-07-23 17:55:08 · 7 answers · asked by ameliawht 2

the sixth exterior angle...i thought the answer was 391 degrees, but that's not right.

2006-07-23 17:48:47 · 5 answers · asked by ameliawht 2

Need someone to check my work, and if wrong, tell me how....

1. How many solutions to this non-linear system -
y=(1/2)x^2+(x)-3
y=x-1

My answer is 2 solutions

2. Use the substitution method to solve this nonlinear system

y=x^2+2x+8
y=-6x-7

I got (11, -3) and (23, -5)

3. Use the elimination method to solve this nonlinear system
3x+y^2=19
x-y=7

I got (5, -2) and (6, -1)

4. How many REAL solutions to this nonlinear system

3x^2+2y=12
-3x^2+4y=24

I got 2 real solutions.

2006-07-23 17:06:51 · 6 answers · asked by metsfan6986 1

2006-07-23 16:50:17 · 11 answers · asked by Anonymous

2006-07-23 15:47:13 · 8 answers · asked by Kate 1

a) 12 cm
b) 6 (square root of 2) cm
c) 8 cm
d) none of these

2006-07-23 15:44:51 · 9 answers · asked by marjorie_062001 2

a) 4.8
b) 7.2
c) 12.2
d) cannot be determined

2006-07-23 15:41:24 · 2 answers · asked by marjorie_062001 2

Solve the equation

2006-07-23 15:23:33 · 10 answers · asked by Anonymous

p(X = -1) = 0.2 p(X = 0) = 0.3, p(X = 1) = 0.1 and p(X = 2) = 0.4

Find the variance.

2006-07-23 15:05:06 · 3 answers · asked by iequate2 2

2006-07-23 15:03:52 · 13 answers · asked by SuperGenie 1

Two outcomes are the same if they contain the same # of 1's, same # of 2's, same # of 3's, same # of 4's, same # of 5's, and same # of 6's

2006-07-23 14:48:46 · 9 answers · asked by Scott R 6

sum of this infinte geometric series?

2006-07-23 14:10:27 · 7 answers · asked by Ron DMC 2

sequence? (as an exanct fraction)

2006-07-23 14:09:07 · 6 answers · asked by Ron DMC 2

Evaluate

(From 0 to 65) 1/(t +1)^1/3 dt

A) 765/4

B) 51/2

C) 24

D) 45/2

2006-07-23 14:03:09 · 8 answers · asked by Anonymous

Evaluate

(from 1 to 0) 6x^5(x^6 + 25)^1/2 dx

Please show step by step work

a) [52(26)^1/2 + 250]/ 3 ~171.72

b) [52(26)^1/2 - 250]/18 ~0.84

c) 2(26)^1/2 -10 ~0.2

d) [52(26)^1/2 -250]/3 ~5.05

2006-07-23 14:00:55 · 2 answers · asked by Anonymous

I mean like visualising swirling, moving mathematical bodies, shifting geometric matrices of music notes and seeing numbers come alive in everything and visualising on a quantum level every possible thing?

2006-07-23 13:36:33 · 6 answers · asked by Anonymous