Write an equation of the ellipse with focus at (0,+-9) and vertices at (0,+-13)
The major axis is along the y-axis
We need to find " b" = √[a^2 − c^2] = √ [ 13^2 − 9^2] = √ [169 − 81] = √88
So.... the equation is
y^2 / a^2 + x^2 / b^2 = 1
y^2 / 169 + x^2 / 88 = 1
