Find the middle term of the Ap 6,13,20, dotdotdot,216. Rs aggarwla
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Step-by-step explanation:
a=6 d=7
using formula
a+(n-1)d = 216
6+(n-1)7=216
6+7n-7=216
7n-7=216-6
7n-7=210
7n=210+7
7n =217
n=217/7
n=31
which is odd
we appling formula of middle term
=n+1/2
=31+1/2
= 32/2
=16
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