SOLUTION: 1.) Find the indicated term using the given information: a20=45, a10=25, a1=? 2.) Find the sum of the infinite geometric series: -10,-5,-5/2?

SOLUTION: 1.) Find the indicated term using the given information: a20=45, a10=25, a1=? 2.) Find the sum of the infinite geometric series: -10,-5,-5/2?

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Question 969332: 1.) Find the indicated term using the given information: a20=45, a10=25, a1=?
2.) Find the sum of the infinite geometric series: -10,-5,-5/2?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Subtract the second equation from the first,

Then,

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Look at the ratio of successive terms,

So each subsequent term is the previous term divided by 2.

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