Question

What is the common difference of each arithmetic sequence?
3. 16, 19, 22, 25, . . .

4. 3, 5.8, 8.6, 11.4, . . .

Answer 1

\[d = a_{n+1}-a_n\]

Answer 2

3. common difference is 19 - 16
4. its 5.8 - 3

Answer 3

Let me explain what @amistre64 wrote
d-->common difference
n--> Any nth term of the arithmetic progression(AP)
n+1-->The term in AP immediately after the nth term

Answer 4

And a_n , a_(n+1) are the nth term and n+1 th term respectively