Question

Daca x apartine n si 0,(2x) barat + 0,(3x) barat mai mic sau egal cu 0,(56), atunci x apartine multimii A.{0,1,2,3} , B. {1,2,3} , C. {0,1,2}, D. {0,1,3}

Answer 1

A={1,2,3,4}
B={2,3}
C={1,2}
3x+1<10
3x<10-1
3x<9
x<9:3
x<3
X={1,2}