<PRE><B>Question 1038930</B>
.
The sum of the first 10 terms of an arithmetic sequence is 530. What is the first term if the last term is 80? 
What is the common difference?
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Reverse the progression from the last term to the first term,
by making 80 its new first term.


It will be still AP with the same sum.


Will it help you to solve the problem?


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