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Difference / Subtraction of Two Sets:The difference or subtraction of two sets X and Y denoted by X - Y is a set of all thoseelements which belong to set X and do not belong to set Y. For example, if X - (a, b, c, d, e)and Y - fa, e, i, o, u) then X - Y - {b, c, d) (we have ignored the common elements which arepresent in both sets X and Y) Here b. Gd are present in set X only and not in set y.Similarly, Y-X-{a, cha, u} - (a, b, c, d, e) - {1,0, u).We also notice that X-YY-X.Universal SetA universal set is the super set of all the given sets in a given situation. It is usually denoted byU or X Example:Suppose we have U=(1.2.3.4.5.6,7,8,9,10), A - (2.4.6.8.10), B = {1,2,3,4,5), C - 16,7,8,9,10),then U is the super set of sets A, B and C Sets A, B and C are called sub-sets of U. All theelements of sets A, B and C are present in U.Complement of a Set:Complement of a set A, denoted by is a set of all those elements which are present inUniversal set U and not in set A. Example:If U = {1,2,3,4,5,6,7,8,9,10), A = {2,4,6,8,10), thend=U-A= {1,2,3,4,-_10) - 2,4,6,8,10)= {1,3,5,7,9)5,7). Find (1) A - BLU = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10), A12(T) AN B​

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Answer:

mantle is a LAYER INSIDE a planetary body bounded below by a core and above by a crust. Mantles are made of rock or ices, and are generally the largest and most massive layer of the planetary body. Mantles are CHARACTERISTIC of planetary BODIES that have undergone differentiation by DENSITY.



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