SOLUTION: Evaluate the series 4+8+16 to S[6]

Algebra ->  Sequences-and-series -> SOLUTION: Evaluate the series 4+8+16 to S[6]      Log On


   

Question 448472: Evaluate the series 4+8+16 to S[6]
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



4+8+16+32+64+128 = sum%28+2%5E%28n%2B1%29%2C+n=1%2C+6+%29 

or 

  sum%28+2%5E%28n%2B1%29%2C+n=1%2C+6+%29+=+a%5B1%5D%28%281-r%5En%29%2F%281-r%29%29 where r = 2