Problem
Write the sum using sigma notation: $-2-4-8+\ldots-32$ Question Help: Video Message instructor Submit Question
Solution
Step 1 ：Write the sum using sigma notation: $-2-4-8+\ldots-32$
Step 2 ：The sum using sigma notation is $\boxed{\sum_{n=1}^{5} -2*2^{n-1}}$
