Răspuns :
i<_843-56×[(23-19):(61-57)+9]
i<_843-56×(4:4+9)
i<_843-56×(1+9)
i<_843-56×10
i<_843-560
i<_283
i={283, 282, 281, ..... ,-infinit}
i<_843-56×(4:4+9)
i<_843-56×(1+9)
i<_843-56×10
i<_843-560
i<_283
i={283, 282, 281, ..... ,-infinit}
843-56×[(23-19):(61-57)+9]=283
=843-56×(4:4+9)=
=843-56×10=
=843-560=
=283
i ≤ 283⇒ i=(-∞, 283]
=843-56×(4:4+9)=
=843-56×10=
=843-560=
=283
i ≤ 283⇒ i=(-∞, 283]