Find the Middle term of an A.P.9,15,21,27,....,183
Answers
Answered by
8
Answer:
n = [(l - a)d] + 1
a = 9, d = 15 - 9 ==> 6 and l = 183
n = [(183 - 9)/6] + 1
n = (174 / 6) + 1
n = 29 + 1 = 30
n = 30(even)
middle terms are (n/2)th term and [(n/2) + 1]th term
15th term = a + 14d
= 9 + 14(6)
= 93
16th term = a + 15d
= 9 + 15(6)
= 99
Answered by
5
Answer:
first we have to know how many terms are in the given sequence.
n = [(l - a)d] + 1
a = 9, d = 15 - 9 ==> 6 and l = 183
n = [(183 - 9)/6] + 1
n = (174 / 6) + 1
n = 29 + 1 = 30
n = 30(even)
middle terms are (n/2)th term and [(n/2) + 1]th term
15th term = a + 14d
= 9 + 14(6)
= 93
16th term = a + 15d
= 9 + 15(6)
= 99
hope it helps you...
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