Réponses

2013-09-02T13:32:56+02:00
1) - (1/x) / (ln(x))² = -1 / x(ln(x))²

2) 2(1 / 2Vx)(1 + Vx) = (1 + \sqrt{x} ) / \sqrt{x}

3) ((2x+1)(2x^3 +4) - 6x²(x²+x+3)) / (2x^3 +4)² = (-2x^4 - 4x^3 -18x²+8x+4) / (2x^3 +4)²

4) ((1 / Vx)(1 + x) - 2Vx) / (1 + x)² = (1 - x) / (1 + x)² \sqrt{x}

5) (1-x + 1+x) / (1-x)² exp((1+x)/(1-x)) = 2exp((1+x)/(1-x)) / (1-x)²