the sum of first 15 terms of an arithemetic sequence is 300 what is its 8th term
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Answer:
8 term = 20
Explanation:
GIVEN
Sum of 15 terms of ap = 300
FIND THE 8TH TERM
Sum of nth term =
Sn = n / 2 (2a + ( n - 1 ) d
S15 = 15/2 ( 2a + 14d ) = 300
2a + 14d = 40
a + 7d = 20
8th term of Ap
T8 = a + 7d
a + 7d = 20 given in above equation
a + 7d = 20
as we all know that a+7d = 8th term
Hence 8th term = 20
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