attend to question 4

Question 3 a) b) Given that A = { (4,2)) . Determine whether R is reflexive, symmetric and transitive Let A =(1 , 2, 3, 4, 5.) , R ={ (a,b) such that ( a+ b) is even }, R is an equivalence relation on set A. Show that R is an equivalence relation. 1, 2, 3, 4} .The relation R on the set A is defined by R ={ (1,1 ) ,(2,2) ,(23) ,(2,4) ,(3,2), 16] 16] Question 4 ) "If interest rates go down, then I will buy a house. If I buy a house, I will need b) Let a function f be defined on a set of real numbers as f(x) = a loan. Therefore, I will not need a loan if I do not buy a house. " Is this argument valid? for all real numbers 17] + 1 x #1. Find the inverse function f c) Is fa bijection? 14]