| What is the product? (2x-1)(x +4) O 2x2-4 O 2x2+4 O 2x2 +78-4 O 2x2–7x-4
1 answer:
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9514 1404 393
Answer:
geometric sequence
Step-by-step explanation:
The terms of the sequence have a common ratio of -12/3 = -4, so the sequence is geometric. The general term is ...
an = 3(-4)^(n-1)
so the sum can be written as ...
(Note the summation starts at n=0, corresponding to a first term of 3.)