Răspunsuri

2014-09-22T19:05:35+03:00
A) x∈R\{- \frac{1}{2} ; \frac{1}{2} ;0; \frac{1}{8} } cred ca asa este aici 
b)E(x)=( \frac{2x-1+2x-1-6x}{4 x^{2}-1 }):  \frac{4 x^{2}-1 }{8x}*x* \frac{4x}{x(x+3)}  

E(x)= \frac{-2x}{4 x^{2}-1 }* \frac{4 x^{2}-1 }{8}  * \frac{4}{x(x+3)}
E(x)= \frac{-2x}{2x(x+3)} => E(x)= \frac{-1}{x+3}
c) E( \sqrt{3} -3) =  \frac{-1}{ \sqrt{3}-3+3 } = \frac{-1}{ \sqrt{3} } =  \frac{- \sqrt{3} }{3}
mersi
http://brainly.ro/tema/174570 te poti uite si la asta daca stii?plss