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Find the eighth term of the geometric sequence, given the first term and the common ratio. a1= 2 and r= -2

Find the eighth term of the geometric sequence, given the first term and the common ratio. a1= 2 and r= -2
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5 votes
find the eighth term of the geometric sequence, given the first term and the common ratio. a1= 2 and r= -2

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User DoiT International
by
8.2k points

1 Answer

4 votes


a_n=ar^(n-1)}\\\\a_1=2\\r=-2\\\\a_8=2\cdot(-2)^(8-1)=2\cdot(-2)^7=2\cdot(-128)=-256

answered
User Ngo Van
by
7.6k points
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