Algebra II
posted by Julia on .
I solved one of these sigma notations and had Reiny check it in an earlier post but this one totally befuddles me
Which of the following terms would not be in the series generated by the expression: 5
Signma symbol (k^25k+2)
k=2
the choices are 2, 2, 4 or 4If you could even just provide a starting point we are just learning this and I'm not doing too great right nowthank you but I'm trying

the 5 should be on top then the signma symbol in middle and the k=2 on the bottom with the equation (k^2 5k+2) to the right of all of it

It simply means subbing in k=2, k=3 ... k=5 into the expression and adding up the results
that is.
= (2^2  5(2) + 2) + (3^2  5(3) + 2) + ... + (5^2  5(5) + 2)
= 4 + (4) + (2) + 2
I can see why you would be confused, since none of your choices are NOT a term generated by the expression.
Misprint in the question?
Question is faulty? 
No the way I typed is is the way it is written
5 on top, sigma symbol in middle and k=2 on bottom with the equation (k^25k+2) to the right and the answers are possible:
4, 4, 2, 2
I'm not sure if I see (4) used above when you substituutedis that the one not generated?? 
of course!
You are right, I guess I can't read my own typing
4 is it! 
Thank you