Question

Help please I need as quick as possible!

Answer 1

Answer:
`\sum^(24)_(n=1) (4n+5)`

Explanation:

This is an arithmetic series with a common difference of 4, so we can immediately eliminate the two left-hand options.

To determine which of the two options on the right is correct, we can determine the first term of each sum expanded out.

• For the top right, the first term is 4(0)+5=5, which does not match the first term of the given sequence.
• For the bottom right, the first term is 4(1)+5=9, which does match the first term of the given sequence.