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1. ### Let R have probability mass function (pmf) p(r) = 1/8 for r = 1, 2, . . . , 8.?

R may take the values form 1 to 8 with equal probability of 1/8: P(R = 1) = 1/8 P(R = 2) = 1/8 P(R = 3) = 1/8 P(R...

2 Answers · Science & Mathematics · 18/01/2013

2. ### Express (7r+10)/r(r+1)(r+2) in partial fractions?

(7r + 10)/r(r + 1)(r + 2) = A/r + B/(r + 1) + C/(r + 2) A(r + 1...(r + 1) = 7r + 10 r = 0 --> 2A = 10 --> A = 5 r = -1 --> -B = 3 --> B = -3 r = -2 --> 2C = -4...

1 Answers · Science & Mathematics · 03/01/2013

3. ### math equation ( what does r=?)?

The answer is r= -.5 I didn't know if you wanted the explanation or not but I...: 2r=-1 Divide 2r by both sides and the answer is r=-1/2 or -.5

2 Answers · Science & Mathematics · 14/10/2010

4. ### Quadratic, how to solve for R?

Simplify: (square the top and bottom of the fraction, then multiply top by R: 22.4 = 14400R/(R+139)^2 Clear fraction: (multiply both ...

2 Answers · Science & Mathematics · 21/10/2009

5. ### what does (1+r/m)^m tend to as m tends to infinity? Thanks!?

(1+r/m)^m (1+1/(m/r))^m (1+1/(m/r))^mr/r (1+1/(m/r))^r(m/r) as m -> infin, so does m/r (1+1/(m/r))^r(m/r) This is e^r Lets evaluate the limit mathematically...

3 Answers · Science & Mathematics · 03/12/2008

6. ### VB : R = A + Csquared?

R=A + C^2 R-A= C^2 + or - sqrt(R-A) =C C=sqrt(R-A) or C=-sqrt(R-A)

2 Answers · Science & Mathematics · 30/08/2007

7. ### If r is rational and r^2 is an integer, prove that r is an integer....Math Proofs- irrational and integers?

r is rational, so r = a / b for some integers a and b, where b is not zero...b^2 = 1 This implies b = 1 or = -1 Since r = a / b, it is the case that r = a / 1 = a or r = a / -1 = -a...

1 Answers · Education & Reference · 30/09/2011

8. ### how to solve r^2+3r=5?

R= 1.1926, -4.1926 Try using MathWay.com Hope this helps!

4 Answers · Science & Mathematics · 07/04/2013

9. ### Blank DVD's. Should I get +R or -R?

The -R was the original format of the DVD created, and created... had to make the name different somehow, so the went with +R. They were originally intended for computers and not...

3 Answers · Computers & Internet · 24/07/2008

10. ### Show that ∑(n+ r-1)(n+r) = (1/3n)(7n^2 – 1)?

∑ _{r=1, n} 1= n ∑ _{r=1, n} r= (n+1)·n/2 ∑ _{r=1, n} r²= n·(n+1)·(2n+1)/6 ==>...2nr +r² -n -r) = (n²-n)·∑ _{r=1, n} 1 + (2n-1)· ∑ _{r=1, n} r + ∑ _{r=1, n} r² = (n²-n)·n + (2n-1)·(n...

1 Answers · Science & Mathematics · 26/07/2009