Question

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Fie expresia E(x) = 7-2 · $\frac{x+1}{x-1}$ · ( $\frac{1}{x-1}$ - $\frac{1}{x+1}$ ) : ( $x-1 ) ^ {-2}$

a) . Pentru ce valori reale ale lui x expresia E nu are valoarea definita ?
b) . Aratati ca expresia are valoare constanta ( nu depinde de x ) .

Answer 1

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E(x)=3 ,∨ x ∈ R => E(x) nu depinde de x