+0  
 
0
548
3
avatar

1/3 - 2/9 + 3/27 - 4/81 + 5/243

Guest Jan 13, 2015

Best Answer 

 #2
avatar+20680 
+10

1/3 - 2/9 + 3/27 - 4/81 + 5/243

$$\frac{1}{3} - \frac{2}{9} + \frac{3}{27} - \frac{4}{81} + \frac{5}{243} = \sum \limits_{n=1}^{5}(-n)(-3)^{(-n)}$$

heureka  Jan 13, 2015
 #1
avatar+94120 
+10

$$\displaystyle\sum_{n=1}^{5}\;\; \frac{(-1)^{n+1}\;n}{3^n}$$

Melody  Jan 13, 2015
 #2
avatar+20680 
+10
Best Answer

1/3 - 2/9 + 3/27 - 4/81 + 5/243

$$\frac{1}{3} - \frac{2}{9} + \frac{3}{27} - \frac{4}{81} + \frac{5}{243} = \sum \limits_{n=1}^{5}(-n)(-3)^{(-n)}$$

heureka  Jan 13, 2015
 #3
avatar+94120 
0

Yes, there is more than one way to skin a cat. Thanks Heureka

Melody  Jan 13, 2015

10 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.