[" (4) "p^(3)+q^(3)+r^(3)=3pqr],[" All points lying inside the triangle formed by the points "(1,3),(5,0)" and "(-1,2)" satisfy "-" IJEE "1986]],[" (A) "3x+2y>=0quad " (B) "2x+y-13>=0quad " (C) "2x-3y-12<=0quad " (D) "-2x+y>=0],[" The diagonals of a soutre are aleng the "]