Posted by **ELIJAH HAVA** on Sunday, April 28, 2013 at 2:47am.

Find the indicated sum n sigma k=1 4(0.5)^k

- maths -
**Reiny**, Sunday, April 28, 2013 at 5:57am
= 4(.5)^1 + 4(.5)^2 + 4(.5)^3 + .... + 4(.5)^n

= 4( .5^1 + .5^2 + .5^3 + ...+ .5^n)

just for the brackets,

a = .5 , r = .5 , n = n

sum(n) = .5( 1 - .5^n)/(1-.5)

= 1 - .5^n

## Answer this Question

## Related Questions

- Algebra - find the indicated sum not sure how to type the sigma sign, but here ...
- algebra - find the indicated sum 4 on top of sigma symbol i=1 on the bottom of ...
- Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...
- Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...
- Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...
- Geometry - The vertices of a regular 10-gon are labeled V_1, V_2, \ldots V_n, ...
- sigma notation - find the value of the sum n sigma i=1 (2-5i)
- math - hi i startted the problem below by writing a sigma notation of sigma[(2^(...
- math - hi i startted the problem below by writing a sigma notation of sigma[(2^(...
- maths - Find the indicated sum. n ‡”4(0.5)^K K=1 Help me because I do not know ...

More Related Questions