Asked by Ayane
Find first term and common difference of arithmetic sequence whose 13th them is 159 and 20th is 264.
Answers
Answered by
Damon
a + 12 d = 159
a + 19 d = 264
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7 d = 105
d = 15
a = 159-12(15) = -21
a + 19 d = 264
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7 d = 105
d = 15
a = 159-12(15) = -21
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