SOLUTION: If a= -5, Tn= 22, and Sn= 85, determine n.

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Question 937479: If a= -5, Tn= 22, and Sn= 85, determine n.
Answer by MathTherapy(10552) About Me  (Show Source):
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If a= -5, Tn= 22, and Sn= 85, determine n.


a%5B1%5D+=+-+5; T%5Bn%5D+=+22; S%5Bn%5D+=+85

Number of terms, or highlight_green%28n+=+10%29