Wednesday
October 22, 2014

Homework Help: calculus

Posted by Jace on Friday, May 24, 2013 at 1:15am.

I'm having trouble with a geometric series problem.

Determine if

the infinite summation of

(-3)^(n-1)/4^n

converges or diverges. If it converges, find the sum.

So the answer says that

sigma -3^(n-1)/4^n

= 1/4 * sigma (-3/4)^(n-1)

How did they factor out the 1/4? My algebra is very weak :(

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