Question

nth term of the sequence 1 6 11 16

Answer 1

1+5 =6
6+5=11
D=5
Nth term = a + (n-1)d
Where a = first term
d = common difference
Nth term = 1 + (n-1)×5
= 5n- 4

Answer 2

1 + ( n - 1 ) 5
= 5n - 4