Question

Find the middle term of the AP... 6,13,20......, 216.

Answer 1

Answer:

n=31

an/2=107.5

Step-by-step explanation:

Answer 2

a=6

d=7

nth term=216

we know that,

nth term=a+(n-1)d

216=6+(n-1)7

210=7n-7

217=7n

n=31

there are 31 terms in A.P

the middle term of given A.P. is 16th term...

t16=a+(16-1)d

16th term=6+(15)7

middle term=6+105=111

middle term of given A.P is 111

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