PLS HELP ME!!!!!!!!! WILL MARK BRAINLIEST!!!!!
2 answers:
You might be interested in
Answer:
- 819
Step-by-step explanation:
The sum to n terms of a geometric series is
=
where a is the first term and r the common ratio
Here a = 1 and r = - 4 ÷ 1 = - 4, thus
=
=
=
= - 819