find the middle term of the series 15,21,27........,135
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Answered by
4
Answer:
75 is the answer
Step-by-step explanation:
we know that a=15 ; d=6; an= 135
a + (n-1)d = 135
therefore 15 + (n-1)6 = 135
implies that n=21
middlemost term is 21+1/2 term that is 22nd term
a + (n-1)d = ?
15 + (11 -1)6=75
Answered by
0
Answer:
33 39 45 51 57 63 69 75 81 87 93 99 105 111 117 123 129
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