A convex lens of power 4D is kept in contact with a concave lens

power 4dA convex lens of power + 6D is placed in contact with a concave lens of power – 4D. What is the nature and focal length of the combination. see full answer. Start JEE NEET FoundationLatest Live 4D Results for Magnum 4D, Sports Toto 4D, Damacai 1+3D, Diriwan 88 Lotto 4D, Sarawak Special Cash Sweep 4D, STC 4D, Singapore Pools 4D + Toto