The power of a lens is +4D. What is the nature of 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 FoundationPower Toto 655 Hot & Cold Numbers. You probably noticed that some numbers just seem to appear in every other draw! These frequently drawn numbers are known as