Question

please answer fast...
Find the middle term of the AP 6, 13, 20,.........216.​

Answer 1

Answer:

Step-by-step explanation:

a=6,d=7,An=216

An=a+(n-1)d

216=6+(n-1)7

210÷7=(n-1)

30=n-1

n=31

Middle term =(n+1/2)

31+1/2

32/2

16

A16=a+15d

6+15×7

105+6

111