here,
an=n(n−1)2+1
where n = 1,2,3,....
so, for 6th term n = 6
a6=6(6−1)2+1=15+1=16
Mean (x) = (38+70+48+34+42+55+63+46+54+44)/10
= 494/10
= 49.4
The point which divides the line in the ratio m:n externally is given by x =m(x2)−n(x1)m−n
Substituting the values we get,
x = 1(3)−1(1)1−1 which is undefined.