Answer:

-5, -8, -11, -14

Step-by-step explanation:

1-4=(-3) then 4+(-3)= 1

-2-1=(-3) then 1+(-3)=(-2)

So [-3] is the pattern

first four terms:

(-2)+(-3)=(-5)

(-5)+(-3)=(-8)

(-8)+(-3)=(-11)

(-11)+(-3)=(-14)