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Mathematics 11 Online
OpenStudy (anonymous):

Write the series with summation notation 1+5+9+13+17

OpenStudy (whpalmer4):

Can you think of a way to describe that sequence?

OpenStudy (anonymous):

It's finite

OpenStudy (whpalmer4):

if I gave you a number input that went 0, 1, 2, 3, 4, could you write a function that produces that sequence from those numbers?

OpenStudy (whpalmer4):

0->1 1->5 2->9 3->13 4->17

OpenStudy (anonymous):

an= 4n -3

OpenStudy (whpalmer4):

that would be one, if I started at 1

OpenStudy (anonymous):

\[\sum_ {1}^{5}4i-3\]

OpenStudy (anonymous):

That's my answer

OpenStudy (whpalmer4):

That's very close: you also need to specify the iteration variable. \[\sum _{i=1}^5 (4 i-3)\]

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