SOLUTION: Please help me find this sum: 15 E-sigma notation {1+(-1)^i} i = 1

Question 326190: Please help me find this sum:
15
E-sigma notation {1+(-1)^i}
i = 1
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

is odd,

and the term is

. If

is even,

and the term is

.

There are 8 odd integers on the closed interval [1,15], so there are 8 terms worth 0 each for a total of 0. There are 7 even integers on the same interval, so there are 7 terms worth 2 each for a total of 14. 0 plus 14 is 14.

John

RELATED QUESTIONS
Please help me write the following sum without using sigma notation 3 E- sigma notation (answered by Fombitz)

Please help me I came up with the first answer. Write the sum using sigma notation: (answered by ikleyn)

Please help me this problem is driving me crazy. Write the sum using sigma notation: (answered by richard1234,ikleyn)

Can someone help? Thank you. Write the sum using summation notation, assuming the... (answered by Edwin McCravy)

hi, i really need help with this. find the sum of the sequence: sigma (2k+7) k=1 and... (answered by robertb)

This is from a worksheet from K12-OHVA- My internet school. How do I find the sum of... (answered by stanbon)

I'm not too sure how to write this, but the problem is ... a four is over the sign for... (answered by Nate)

Please help me, Thanks Write the sum using sigma notation: 1+2+3+4+⋯+102= A... (answered by Edwin McCravy)

could you show me how to write the series 1+(1/2)+(1/4)........(1/4096) in sigma... (answered by stanbon)