If the chord AB length of the left focus F1 passing through the hyperbola X / 16-y / 9 = 1 is 6, then the perimeter of △ abf2 (F2 is the right focus) is () A 28 B 22 C 14 D12

If the chord AB length of the left focus F1 passing through the hyperbola X / 16-y / 9 = 1 is 6, then the perimeter of △ abf2 (F2 is the right focus) is () A 28 B 22 C 14 D12

Choose a and do it according to the definition of hyperbola