CBSE BOARD X, asked by saniafirdous, 1 year ago

Find the middle term of A.P 6,13,20,....216

Answers

Answered by komal70
12
A= 6
D=7
An = a+(n-1) d
216= 6+(n-1)7
n=31
Therefore Total number of terms =31
Middle term= (31+1) /2
=16th
T16= a+(16-1)d
6+(15)×7
=111
Therefore middle term is 111
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