Asked by Nathabiseng
if the second term of an arithmetic sequence is 15 and the fifth term is 24. determine the third and fourth term of the sequence
Answers
Answered by
Damon
a + (n-1) d
second is a + d = 15
fifth is a + 4 d = 24
so a = 15 - d
and
(15-d) + 4 d = 24
3 d = 9
d = 3
then a = 12
so term n is
12 + (n-1)3
second is a + d = 15
fifth is a + 4 d = 24
so a = 15 - d
and
(15-d) + 4 d = 24
3 d = 9
d = 3
then a = 12
so term n is
12 + (n-1)3
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