Question

57. A convex lens is inserted between screen and object. The size of image obtained at the screen is either 6 or 2/3 cm. Then the size of the object

Answer 1

Answer:

In its most general form, algebra is the study of mathematical symbols and the rules for manipulating these symbols; it is a unifying thread of almost all of mathematics. It includes everything from elementary equation solving to the study of abstractions such as groups, rings, and fields.