Answer:
Step-by-step explanation:
the common ratio is -3
formula:an=a1•(r^n-1)
n=4 r=-3 a1=-12
a4=-12•(-3^4-1)
=-12•(-3^3)
=-12•(-27)
=-324
the answer is -324
hope it helps, correct me if i'm wrong.
#CarryOnLearning
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Answers & Comments
Answer:
D. -324
Step-by-step explanation:
the common ratio is -3
formula:an=a1•(r^n-1)
n=4 r=-3 a1=-12
a4=-12•(-3^4-1)
=-12•(-3^3)
=-12•(-27)
=-324
the answer is -324
hope it helps, correct me if i'm wrong.
#CarryOnLearning