SOLUTION: the first and last term of an arithmetic progression are -30 and 10 respectively. find the arithmetic progression and it's 20th term.

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Question 824523: the first and last term of an arithmetic progression are -30 and 10 respectively. find the arithmetic progression and it's 20th term.
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
more information is needed - either the number of terms, or the common difference