Question

Write the generalised statement for the sequence 1,5,9,13.... and find the 20th term.

Answer 1

Answer:

AP= 1,5,9,13

a1=1 and a2=5

common difference, d=5-1

d=4

20th term,

a20= a+19d

a20 = 1+19(4)

= 1+ 76

= 77