SOLUTION: please help me write the series in summation notation. 3+12+21+30+39+48+57 and 125+50+20+8+....

Algebra ->  Sequences-and-series -> SOLUTION: please help me write the series in summation notation. 3+12+21+30+39+48+57 and 125+50+20+8+....      Log On


   

Question 312331: please help me write the series in summation notation.
3+12+21+30+39+48+57
and
125+50+20+8+....
Answer by solver91311(24713) About Me  (Show Source):