Question

need help with evaluating sum notations:

Answer 1

if \[\sum_{i=1}^{10}a_{i}=14 \] and \[ \sum_{i=1}^{20}a_{i}=5\]

Evaluate the following sums:
\[a) \sum_{i=1}^{10}13-a_{i}\]

There's a few more, but I think i'll be able to understand the more complex ones if I get this one.

Answer 2

\[
\sum_{i=1}^{10}13-a_{i} = \sum_{i=1}^{10}13- \sum_{i=1}^{10}a_{i}
\]

Answer 3

\[
\sum_{i=1}^{10}13-a_{i} = \sum_{i=1}^{10}13- \sum_{i=1}^{10}a_{i} = 13(10)-14
\]

Answer 4

@dw3 Make sense? If so, medal?

Answer 5

Got it. Cheers.