The given series has six terms. what is the sum of the terms of the series? (–7) + (–9) + (–11) + . . + (–17) –32 –42 –72 –52

Given that there are six terms, we have this set:



So, we need to find a4 and a5. Given that:

-9-(-7) = -2
-11-(-9) = -2

Then, it is obvious that

∴  
 ∴  

Then, the sum of the terms of the series is:

Dis the correct answer