SOLUTION: what is the series summation notation of 5,10,15,20,25?

Question 706680: what is the series summation notation of 5,10,15,20,25?

Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Try this:

(5+10+15+20+25)+(25+20+15+10+5)
=
=

The sequence was repeated but backwards to create that sum. We want HALF of that sum, so:
WANT:
Note, this is for an arithmetic sequence of sequential terms being summed.
That is the number of terms being summed, the use of the first and last term to be summed, and division by 2.
RELATED QUESTIONS
write each series below in sigma summation notation 5+15+25+35..................... (answered by Fombitz)

write the series -5+5+15+25+35 using summation... (answered by josgarithmetic)

Express the series: 8+9+10+11+...+25 using the summation... (answered by fractalier)

what is the summation notation of 1000,100,10,1,0.1,0.01 (answered by Edwin McCravy,rothauserc)

Write the series using summation notation. 15 + 1 + (-13) +... (answered by Edwin McCravy)

What is the series with summation notation of the following fractions:... (answered by Edwin McCravy)

Summation notation help please!! What is the summation notation for the series?... (answered by ikleyn)

Write the series with summation notation:... (answered by stanbon,jim_thompson5910)

I need help on these questions as I'm preparing for a unit test. Please help Is the... (answered by Alan3354)