MAD 2104 Midterm: MAD 2104 FIU Exam 512k
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1 [20pts each] a) give a recursive de nition of the set of positive integers that are divisible by 7. 3b) decide whether r is transitive and justify your answer. Remarks and answers: the average among the top 26 scores was 63 out of 100, fairly similar to quiz 4. The average for the semester is 72 out of 100 (based on each student"s best 4 of 5 quiz scores - with the top 26 scores included). I wrote your average and letter grade in the upper right corner. The scale for that is about 10 points higher than the one for quiz 5 above (and it now matches the syllabus pretty well). 1a) let s z + such that (b) 7 s and (r) if x, y s then x + y s. [it would be ok to write x + 7 s instead].
