Question

Show that the sequence defined by
An = 2n-3 is an A.P . Find its common difference

Answer 1

Step-by-step explanation:

let n be 1

A1 = 2( 1) -3

=2-3

=-1

let n be 2

A2= 2(2)-3

=4-3

=1

let n be 3

A3=2(3)-3

=6-3

= 3

yes this squence is an ap

D = A2-a1

= 1-(-1)

= 2