Răspuns:
Explicație pas cu pas:
4)
a) x<2,3+1,34, x<2,30+1,34
x<3,64, dar x€N, deci x={0,1,2,3}
b) x+4,77<6,03, x<6,03-4,77
x<1,26, dar x€N, deci x€{0,1}
c) x<3,5^2+7,75, x<12,25+7,75
x<20, dar x€N, deci x€{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}
