Mathematics

Problem

A student records the following information for the ellipse

\dfrac{x^{2}}{49}+\dfrac{y^{2}}{16}=1

: (i) Centre:

(0,0)

(ii) Vertices:

(\pm 7,0)

(iii) Co-vertices:

(0,\pm 4)

(iv) Foci:

(0,\pm \sqrt{33})

Which line contains an error? a) Only (ii) b) None; all four lines are correct c) Only (iv) d) Both (ii) and (iii)