∂ 4 4 5 3 4 5 4 3 5 4 3 5 sdfdffdfdsfdsω ≈≈ ccc √√ 2 5 3 2 5 3 5 2 3 3 2 aßßaßaßaƒßƒdffbxfbewrg 3 eur 5 h 3 4 9 th 4 ƒ ∂∂ ƒ ∂ ƒ ∂ ƒ ≈ # @ # # % # % rr 3 - t 4 3 t = 3 t 3 gidifjginv