Heidi-Heather
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Report Thread starter 2 years ago
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Hi! I'm stuck on this question:

'A geometric sequence ๐บG has first term 8 and common ratio โˆ’0.5.
Find an arithmetic sequence that has the same first term and two other terms the same as the corresponding terms of ๐บG.'

I've got that the geometric sequence is 8, -4, 2, -1, 0.5, . . . but I have no clue how to proceed from here and find an arithmetic sequence that fits those parameters. Any help would be appreciated.
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ghostwalker
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#2
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(Original post by Heidi-Heather)
Hi! I'm stuck on this question:

'A geometric sequence ๐บG has first term 8 and common ratio โˆ’0.5.
Find an arithmetic sequence that has the same first term and two other terms the same as the corresponding terms of ๐บG.'

I've got that the geometric sequence is 8, -4, 2, -1, 0.5, . . . but I have no clue how to proceed from here and find an arithmetic sequence that fits those parameters. Any help would be appreciated.
I don't think they're looking for an analytical solution, rather trial and error. Being systematic, one turns up very quickly.
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Heidi-Heather
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OK, thanks.
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