Question

Sind patton of each following
7. 3,-1,- 5,-​

Answer 1

Answer:

-9

Step-by-step explanation:

Answer 2

Answer:

-9,-13

Step-by-step explanation:

D= a2 -a1

3-7 = -4

D =-4

a3= a2 +D

3+(-4)

3 - 4

= -1