Here you go this is the answer
Which expression is equivalent to 4(5r+9)?
1 answer:
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Answer:
- 1364
Step-by-step explanation:
The n th term of a geometric series is
= a
where a is the first term and r the common ratio
4 ← is an n th term
with a = 4 and r = - 2
The sum to n terms of a geometric series is
=
, thus
=
=
=
=
= - 1364