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Do you
think we can find a formula that will work for adding
all the integers from
1
to n?
Think about it!
Look over the last three problems we just did -- see anything?
Let's write it
out the same way:
How many pairs of
n + 1
are there?
Half
of
n!
 |
pairs of |
 |
TEST IT:
Find the sum
(You know it will be
5050
+ 101
= 5151.)
Does the
formula work?
How would you
write this series in sigma notation?
Continued on the
next
page
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