Question

Se dau multimile :
A={x€Z/x divide 30}
B={y€Z/y=(-120):(-x), x€A}
C={t€Z/t= (-x+3)× |-20| ÷(-20),x€A}.
Calculati B/A,C/B si B(U intors)C
Va rog ajutati-ma!!
Dau 20 puncte si coroana

Answer 1

A={-30,-15,-10,-6,-5,-3,-2,-1,0,1,2,3,5,6,10,15,30}
B={-120,-60,-40,-24,-20,-12,-8,-4,4,8,12,20,24,40,60,120}
y=(-120):30= -4
y= -120:15=8
y= -120:10= -12
y= -120:6= -20
y= -120:5= -24
y= -120:3= -40
y= -120:2= -60
y= -120:1= -120
y= -120:0= -120

C={-33,-18,-13,-9,-8,-6,-4,-3,3,4,6,8,9,13,18,33}
t=(30+3)×20:(-20)=33×20:(-20)=660:(-20)= -33
t=(15+3)×20:(-20)=18×20:(-20)=360:(-20)= -18
t=(10+3)×20:(-20)=13×20:(-20)= 260:(-20)= -13
t=(6+3)×20:(-20)=9×20:(-20)=180:(-20)= -9
t=(5+3)×20:(-20)=8×20:(-20)=160:(-20)= -8
t=(3+3)×20:(-20)=6×20:(-20)=120:(-20)= -6
t=(1+3)×20:(-20)=4×20:(-20)=80:(-20)= -4
t=3×20:(-20)=60:(-20)= -3