Question

f:R\{0}->R, f(x)= (x^2+2x)/x^3
Sa se arate ca f(x)=1/x+2/x^2

Answer 1

        
$\frac{ x^{2}+2x }{ x^{3}}= \frac{ x^{2} }{x^{3}} + \frac{2x}{x^{3}}= \frac{1 }{x} + \frac{2}{x^{2}} \\\\ cctd$