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September 19, 2014

September 19, 2014

Posted by **michael** on Wednesday, January 25, 2012 at 9:12am.

find the sum of the 1st 7th term

- maths -
**Reiny**, Wednesday, January 25, 2012 at 9:33amI will assume to meant that first term to be .05

a=.05

r = .1

term(7) = ar^6 = (.05) (.1)^6 = .00000005

(notice term2 had 2 zeros before the 5

term3 had 3 zeros before the 5

..

term7 has 7 zeros before the 5 )

sum(7) = (.05)(1 - .1^7)/(1 - .1)

= .05555...

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