Explicație pas cu pas:
[tex](x + 1) \div x = 2 \\ x + 1 = 2 \times x \\ x = 1 \\ \\( x {}^{2} + 1) \div x {}^{2} = (1 {}^{2} + 1) \div 1 {}^{2} = 2 \div 1 = 2 [/tex]
[tex](x {}^{3} + 1) \div x {}^{3} = 2[/tex]
[tex](x {}^{4} + 1) \div x {}^{4} = 2[/tex]
[tex](x - 1) \div x = (1 - 1) \div 1 = 0[/tex]