SOLUTION: the third term and the seventh term of an arithmetic sequence are 11 and 27 respectively . find the common difference?
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Question 767341: the third term and the seventh term of an arithmetic sequence are 11 and 27 respectively . find the common difference? Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! a + 2d = 11 (3rd term)
a + 6d = 27 (7th term)
Subtract
- 4d = - 16
d = 4
Common difference = 4
Hope this helps.
:-)
