Write 1 + 2 + 3 + ... + 10 using sigma notation

Anonymous
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STEP 1: Recall what is summation notation
http://www.columbia.edu/itc/sipa/math/summation.html
STEP 2:
The first term is 1
The second term is 2
The third term is 3
etc
Generally, the n'th term = n
and there are 10 terms, so n goes from 1 to 10 . This is expressed by the notation.
\sum_{n=1}^{10} n
Skills to recall:
What are terms