Posted by Julia on Monday, December 5, 2011 at 12:17pm.
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

Algebra II  Julia, Monday, December 5, 2011 at 12:18pm
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

Algebra II  Reiny, Monday, December 5, 2011 at 12:27pm
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?

Algebra IIReiny please recheck  Julia, Monday, December 5, 2011 at 12:38pm
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??

Algebra II  Reiny, Monday, December 5, 2011 at 1:01pm
of course!
You are right, I guess I can't read my own typing
4 is it!

Algebra II  Julia, Monday, December 5, 2011 at 2:16pm
Thank you
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