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In a A.P, the difference between the 8th and the 4th terms is 20 and the 8th term is 1^1/2 times the fourth term. What is the common difference, first term of the sequence
4 years ago

Answers

oobleck
(8-4)d = 20, so d = 5

a+7d = 3/2 (a + 3d)
a = 25
4 years ago

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