Question

dada la sucesión 1,2,3,4,5,8,x,y,z
calcula x+y-z
A:12
B:14
C:19
D:16

Answer 1

sale B 
1+2=3+2=5+2=7+2=9
2*2=4*2=8*2=16
x+y-z
7+16-9=14