- #1
Mo
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Series and "Sigma" Notation
I have been revising over the sigma/sequences and series chapters, this is the second question now where i have had different answers to the book - yet- my answers seem to work - i think...
The question :
Write in [tex]\sum[/tex] notation
1 - 2 + 4 - 8 + 16 - 32
My answer is:
[tex]\sum_{0}^5 -2^r[/tex]
Is this correct?
Thie answer in the book by the way is:
[tex]\sum_{1}^6 (-1)^{r+1} \ 2r^{r-1}[/tex]
Regards,
Mo
I have been revising over the sigma/sequences and series chapters, this is the second question now where i have had different answers to the book - yet- my answers seem to work - i think...
The question :
Write in [tex]\sum[/tex] notation
1 - 2 + 4 - 8 + 16 - 32
My answer is:
[tex]\sum_{0}^5 -2^r[/tex]
Is this correct?
Thie answer in the book by the way is:
[tex]\sum_{1}^6 (-1)^{r+1} \ 2r^{r-1}[/tex]
Regards,
Mo