A curva dada implicitamente pela equação 3 + 3 − 9 = 0 é chamada de Folium de Descartes. A derivada fraction numerator d y over denominator d x end fraction (de em função de ) dessa curva é dada por: a. fraction numerator d y over denominator d x end fraction equals 3 y squared minus 9 x b. fraction numerator d y over denominator d x end fraction equals fraction numerator 3 y minus x squared over denominator y squared minus 3 x end fraction c. fraction numerator d y over denominator d x end fraction equals fraction numerator negative x squared over denominator y squared minus 3 end fraction d. fraction numerator d y over denominator d x end fraction equals 3 x squared minus 9 y e. fraction numerator d y over denominator d x end fraction equals fraction numerator x squared plus y squared over denominator 3 x end fraction