Thread: Sigma Help?

Hi
I forgot how to solve sigma problems and these are one of the last problems I need to solve for my AP Calc summer assignment. If someone could help, I would greatly appreciate it

The directions say to expand and simplify:

a)

4
E n2 / 2
n=0




b)
1
E 1/n^3
n=1


I am pretty sure you start off with substituting (n=..) for n but how would I continue the problem?

Thanks for helping!

Originally Posted by habibixox

Hi
I forgot how to solve sigma problems and these are one of the last problems I need to solve for my AP Calc summer assignment. If someone could help, I would greatly appreciate it

The directions say to expand and simplify:

a)

4
E n2 / 2
n=0




b)
1
E 1/n^3
n=1

if I interpreted your first summation correctly ...



get the idea?

Awesome! Yes, I do, thank you
It refreshed my memory :P

so would the second one be this?

1
E 1/n^3
n=1

1
1E n^3 = 1(0^2 + 1^2) = 1?

n=1

Originally Posted by habibixox

Awesome! Yes, I do, thank you
It refreshed my memory :P

so would the second one be this?

1
E 1/n^3
n=1

1
1E n^3 = 1(0^2 + 1^2) = 1?

n=1

incorrect.





you need some review on your own ...

Algebra II Recipe: Using Summation Notation

Originally Posted by skeeter

incorrect.





you need some review on your own ...

Algebra II Recipe: Using Summation Notation

thank you for your help! it means a lot I reviewed that website, and searched for other practice problems. Thanks again!