Question

Buna, va rog ajutati-ma (explicati-mi) cum se rezolva acest exercitiu! Este urgent! Va rog: Fie A = {-1,4 ; -1$\frac{4}{5}$ ; $\sqrt{1,96}$ ; 0; -0,(4) ; $\frac{1}{2}$ Determinati multimea B = {y ∈ R I y = IxI; x ∈ A} Multumesc

Answer 1

-4/15=-0,2(6)
√1,96=√196/100=√196/√100=14/10=7/5
1/2=0,5
y=I-1,4I=1,4
y=I-4/15I=4/15
y=I7/5I=7/5
y=I0I=0
y=I-0,(4)I=0,(4)
y=I1/2I=1/2
B={1,4;4/15;7/5;0;0,(4);1/2}