Question

rezolvati in multimea numerelor naturale inecuatiile:
a)2•(x+13)<145-103
b)3•(y+21)<64

Answer 1

1)2x(x+13)<145-103
2x+26<42
2x<16
x<8
x   apartine{0,1,2,3,4,5,6,7}
2)3x(y+21)<64
3y+63<64
3y<1
y<1/3    nu   apartine  N