SOLUTION: The sum of first 20 and 50 terms of an AP is 420 and 2550. Find the eleventh term of a GP whose first term is the same as the AP and the common ratio is equal tithe common differen
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-> SOLUTION: The sum of first 20 and 50 terms of an AP is 420 and 2550. Find the eleventh term of a GP whose first term is the same as the AP and the common ratio is equal tithe common differen
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Question 891695: The sum of first 20 and 50 terms of an AP is 420 and 2550. Find the eleventh term of a GP whose first term is the same as the AP and the common ratio is equal tithe common difference of the AP ? Answer by robertb(5830) (Show Source):
You can put this solution on YOUR website! The sum of the first n terms of an AP is given by
==>
and
or and
Solving these equations give
==>
