The mid-point of the chord of the ellipse
is (a, b) then value of a-b is--
2
3
4
5
Let (h, k) is mid point of chord then equation of chord is
,,,,[i]
Compare equation (i) with 9x – 4y = 13,
9h = 9, 4k = –4
⇒ h = 1 ⇒ k = –1
The mid point is (1, –1).
So, a = 1, b = –1
The value of a – b = 1 + 1 = 2
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