The critical points of a cubic equation are those values of x where the slope of the cubic function is zero. They are found by setting derivative of the cubic equation equal to zero obtaining: f â²(x) = 3 ax 2 + 2 bx + c = 0.n other words, a cubic function is defined by a polynomial of degree three. Setting Æ (x) = 0 produces a cubic equation of the form: Usually, the coefficients a, b, c, d are real numbers. However much of the theory of cubic equations for real coefficients applies to other types of coefficients (such as complex ones).
The name Karina is of Russian and Polish origin. The meaning of Karina is pure, chaste. Karina is generally used as a girl's name. It consists of 6 letters and 3 syllables and is pronounced Ka-ri-na.
Most little girls of Karina Oakley's age are chatterboxes, just like her. But few can talk as much sense. The toddler has just been found to have an IQ of 160 - the same as Stephen Hawking and six points higher than Carol Vorderman - which makes her eligible to join Mensa. Experts say that she is particularly imaginative and gifted with words.