Question

Rezolvati: [x] = 3, [2x]= 2

Answer 1

[x]<=x<[x]+1

Deci

[x]=3

[x]<=x<[x]+1

3<=x<3+1

3<=x<4

=> S=[3; 4)

[2x]=2

[2x]<=2x<[2x]+1

2<=2x<2+1

2<=2x<3 |:2

1<=x<1,5

=> S=[1; 1,5)