Mathematics

Problem

The equation

\frac{x^2}{10 - \lambda} + \frac{y^2}{6 - \lambda} = 1

represents a. a hyperbola if

\lambda < 6

b. an ellipse if

\lambda > 6

c. a hyperbola if

6 < \lambda < 10

d. an ellipse if

0 < \lambda < 6