Question

What is the length of the major axis of the conic section `(x+2)^2/49 + (y-1)^2/25 =1`?

Answer 1

`14`.

Explanation:

If the eqn. of an ellipse is `x^2/a^2+y^2/b^2=1, a gt b,`

the length of its major axis is `2a`.

In our case, `a^2=49, b^2=25. :. a=7, b=5, and, a gt b.`

Hence, the required length is `2xx7=14`.