Question

E(x)=4x/x^2+1

Demontrati ca -2

Answer 1

[tex]E(x)= \frac{4x}{ x^{2} } +1\\\\ E(x)= \frac{4x+ x^{2} }{ x^{2} } \\\\ E(x)= \frac{x(4+x)}{ x^{2} } \\\\ E(x)= \frac{4+x}{x} [/tex]