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

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