Question

i need help!!here is the question:give the rule for the number sequence.write the net three numbers.1,3,8,19,42,89_,_,_

Answer 1

1*2+1=3
3*2+2=8
8*2+3=19
19*2+4=42

Answer 2

Mathe is right

Answer 3

1x2+1 = 3
3x2+2 = 8
8x2+3 = 19

next 3 numbers = 184, 375, 758