0 votes 0 votes A relation R1 : aRb iff (a congruent b) modulo 5 and relation R2 : aRb iff (a congruent b modulo 7). What will be R1 U R2 ? Mathematical Logic discrete-mathematics self-doubt + – curious mind asked Jan 1, 2023 curious mind 318 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply raja11sep commented Jan 1, 2023 reply Follow Share R1 U R2 : Reflexive, Symmetric. 0 votes 0 votes Vishal_kumar98 commented Jan 3, 2023 reply Follow Share R1 U R2 is the relation that contains all pairs (a,b) such that a is congruent to b modulo 5 or modulo 7, or both. 0 votes 0 votes Please log in or register to add a comment.