What are the first three of an arithmetic sequence whose last term is 1 if the comon diffirence is 5. Tere are 14 terms in the sequence?
回答 (1)
2016-06-22 4:03 pm
For the arithmetic sequence :
The first term, T(1) = a
Common difference, d = 5
T(14) = 1
a + 13d = 1
a + 13*5 = 1
a + 65 = 1
a = -64
T(1) = -64
T(2) = -64 + 5 = -59
T(3) = -59 + 5 = -54
The first three terms are : -64, -59, -54
The first term, T(1) = a
Common difference, d = 5
T(14) = 1
a + 13d = 1
a + 13*5 = 1
a + 65 = 1
a = -64
T(1) = -64
T(2) = -64 + 5 = -59
T(3) = -59 + 5 = -54
The first three terms are : -64, -59, -54
收錄日期: 2021-04-18 15:11:31
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