Answer:
the missing terms:8 and -13
common difference:-7
Step-by-step explanation:
the difference between the first and the second term is:15-22=-7
the difference between the fourth and fifth term is -6-1=-7
so the difference between the third and second term is -7
1-x=-7 so x=8
so the difference between the fifth and sixth term is -7
x-(-6)=-7 so x= -7-6=-13
