Question

the common difference of the AP 1,-3,-7,-11​

Answer 1

Answer:

answer is -4

Step-by-step explanation:

d= a2-a1

d=-3-1

d=-4

Answer 2

Answer:

this is an AP

Step-by-step explanation:

because

here,a1=1

A2=-3

common difference d=à2-à1

=1-(-3)

1+3=4

a3-a2

-3-(-7)

=-3+7=4

so, the common difference d=4