Question

Find the common difference of the arithmetic sequence. 9, 13, 17, 21, . . .

Answer 1

Answer:

a2-a1

13-9=4

d=4

a3-a2

17-13=4

d=4

now try last one

Answer 2

Answer:4

Step-by-step explanation:

Common difference =a2-a1

Where a1=13 and a2=9

d=13-9

=4