4. Niech W(x) = ax²+ 2×2-x+a, gdzie x = R. A Jeśli a = 0, to lim W(x)= lim W(x) スートー B. Jeśli a 0, to lim W(x)= lim W(x) C. Jeśli a = 0, to lim W(x)= lim W(x)=- D. Jeśli a = 0, to lim W(x)=- i lim W(x)=+00,