Ellipse x 2/3+y 2/2 =1,straight line l1passes through f1(-1,0), passes through ellipses a and b, and straight line l2 passes through F2( 1, 0).

Let l 1:y=k(x+ 1), then l2:y=(- 1/k)(x- 1),

∴: It should be-1/k, not 1/k.