Răspuns:
Explicație pas cu pas:
Prima fractie
x/(x^3 + x^2) = x/x^2(x + 1) = 1/x(x + 1)
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Numaratorul celei de-a doua fractii
(x + 2)(2x - 1) - x(x + 3) + 1 = 2x^2 - x + 4x - 2 - x^2 - 3x + 1 = x^2 - 1 = (x + 1)(x - 1)
Numitorul celei de-a doua fractii
(2x + 2)(3x - 3) = 2(x + 1)*3(x - 1) = 6(x + 1)(x - 1)
A doua fractie
(x + 1)(x - 1) / 6(x + 1)(x - 1) = 1/6
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E(x) = 1/x(x + 1) : 1/6 = 1/x(x + 1) * 6/1 = 6/x(x + 1)
