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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?

(7 r + 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