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37 votes
What is a8 for the geometric sequence 6,561;−2,187;729;−243;….

User Bendik Knapstad
by
3.1k points

2 Answers

20 votes
20 votes
Easy dividend dont equal 7+10
User Rowan Miller
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3.3k points
14 votes
14 votes

Answer:

In geometric sequence you divide the terms. As I will show you the calculations step by step. Hopefully this becomes clear and helpful to you

Explanation:

-2187÷6561

= -0.3333...

a8=a1 r^8-1

=(4374)(-0.3)^8-1

=(4374)(-0.3)^7

=(4374)(-4.572473708×10^-4)

=-2

Therefore a8= -2

User Dmitry Zaets
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3.2k points