I enjoyed this class. Full disclosure, I am not usually very good at math classes; that being said, I though Professor Marengon did a great job. I saw all the reviews about how he wasn't clear and I was scared going into his class. I think that if you put in the work necessary you'll be fine. He also bruincasted the class this quarter, which was really helpful! I am not particularly happy with my grade because I know I could have done better, but this wasn't really an ideal situation. Professor Marengon usually curves the class to offset the difficulty of the midterms/final, but this quarter it seems he chose not to due to a student posting one of the answers on the final to Chegg. It's extremely unfortunate considering that our midterm medians were in the 60s and 50s respectively, and this hurt a lot of people's final grades. Nonetheless, it was a bad situation and he's still a good professor and you can definitely do well in his class. This is coming from someone who historically is NOT GOOD AT MATH. I was doing quite well in the class (compared to medians) until the whole pandemic.

Also my TA was amazing (Joe Breen). Really recommend choosing a discussion with him if possible, he was super helpful.

Wow the midterm averages were at 50-60 and he really had the audacity to not curve the final grade because people were cheating on finals or something. I got 87/100 on the final and i still get B- as the final grade? I understand that perhaps everyone did very good on final and got As and Bs but it's ridiculous that i'd get B+ on the final and get a worse final grade. my midterm grade was above average too.

I felt uneasy starting his class after reading his Bruinwalk reviews, but Marengon is a good professor. I feel like a majority of the low ratings are probably because 31B is generally just a difficult class. Marengon is clear with his lectures and gives many opportunities for students to ask questions if they need more clarification. You can tell he cares about students and their learning. Lectures were even Bruincasted this quarter. He lets you choose between two grading schemes so if you do super badly on one midterm, you can just make the final worth more. Homework was really light, usually about 10 purely computational problems. I didn't think the exams were that bad, but our midterm averages, 65%ish, were surprisingly low. Exam questions were very straightforward and purely computational. He sent out practice exams every time and I felt that doing those were really helpful. His exams are very similar to his practice ones. Also, Marengon is kinda funny in an endearing way so lectures aren't totally boring.

Marengon is not that bad. I don't know why he got a low score on Bruinwalk. I guess this class may be hard for some people. However, if you do all the homework problems and do his practice midterms/finals, you'll be fine. He doesn't test on materials he didn't cover in class/hw. Some people find this class hard because they DID NOT do the mock midterms. Practice exercises on the textbook for more practice definitely helps. At least for me.
Lectures may be slightly disorganized sometimes. I suggest to copy the things down first, read the textbook, and then you'll probably know what he's doing.
He has a cute Italian accent btw. I find it cute but some people find it hard to understand what he's saying.

I really don't know why y'all are shitting on my boy. Marengon truly wants to make sure you get the material and will make sure to answer your questions. All of his examples are straight from the textbook, which some people don't like, but he will thoroughly explain each of them in a way that makes sense. Because of this, you can teach yourself, but I would not recommend skipping class though, especially if you have not taken Calc BC in high school because it can get pretty confusing. This course is hard in general, which is why I don't think some people are being fair to this professor. However, or the very confusing topics, like error bound, he did not make sense at all, so make sure you are going to office hours or getting extra help for that topic! Overall though, Marengon is a very funny professor and I enjoyed taking his class. You only have 10 required math problems to do every week, but do the extra practice given because it will help on the midterms!!!! Some of the problems were taken from the homework, and Marengon offers a lot of practice tests. The midterms and finals are very fair, not like other classes where the difficulty is completely unexpected and impossible to do. As long as you are doing the homework and going to class, you will do well in his class.

If you get the chance to do Peer Learning sessions from AAP, please do it for this class! Natalie is AMAZING and gives you extra help during sessions.

OKAY here’s the tea kids. This math class was NOT easy. I’ll warn you, I’ve been told I’m a really dramatic person. But I died and left my soul in this class.

The thing is, I literally have no clue as to why it was so damn hard. I love Marco. I think he’s so funny and so smart and so pleasant and so organized and so AWESOME. But there was something super odd about this class. First off, it was 99.99999% focused on series (which are just relatively difficult to deal with, no matter how much of a genius you are). They call the course “Integration and Infinite Series”, and it seems like the name held true for some of my friends in the other professors’ classes. HOWEVER, Marco’s class should be called “Lots of Series and Infinite Series and Guess What Even More Series”. There were so many concepts that he covered that other professors teaching the same class didn’t even mention. Basically, this class had me staring at some homework problems for 30 minutes or even an HOUR just trying to figure them out, and no one else knew what was going on either. I dedicated all of my finals midnight screamies to this class.

I’ll admit, I actually did pretty well in the class. I got 100% on the first midterm, 100% on the second midterm, and a 93% on the final (idek at this point cuz he said that there was a mistake grading the final so it hasn’t been updated). BUT DON’T BE FOOLED! THIS WAS STILL THE HARDEST MATH CLASS I’VE EVER TAKEN IN MY ENTIRE LIFE! The midterms were both easier than the homework and mock midterms (in my opinion), but the final was HARD AF AND I USED ALL 3 HOURS TO THE LAST SECOND. I have friends who aced the midterms and literally failed the final. Like straight 50%. When I was studying or doing practice problems, there were so many moments where I genuinely had no idea what to do, and I lost a whole lotta sleep trying to figure out what the hell was going on. Like. I really really do not recommend taking this class with Marco if you don’t need to do it. Sorry Marco dude I love you and appreciate you but this could have been a whole lot easier on my brain if I had taken like ANY of the other professors.

SO YEAH. This class is doable. But BARELY. I can definitely say for sure that I understand the material very well now, but it takes a DAMN lot of work and discipline to fully understand what’s going on. If you’re willing to put in that work, I say go for it. Learning is good. But if you care more about your GPA, stay away.

Overall, Marengon is a great professor who has improved a lot. He is a little awkward at times during lectures, but he presents the information in a very clear and easy to understand way. He would frequently stop during class to make sure he was going at a speed in which everyone could understand and would encourage questions. His office hours were very helpful, and he would offer additional problems to ensure a student grasped the concept. His midterms were reasonable, but his final exam was very difficult. Study hard, and you should do fine!

the class is doable overall. the homework workload is decent: 20 textbook questions per week, but only 10 are necessary the other 10 are completely optional but usually useful questions to do for the hw quizzes/midterms. there are two hw quizzes, which are very easy especially if you do all the homework problems, and two midterms, which were ok difficulty, the averages were around 75-80. prepare for the midterms by doing the mock midterms he emails you and prepare for the final by doing the mock finals he sends they are usually very similar if you can just do the mocks well you’re chilling. also try to stay on top of the hw and do all 20 questions, you don’t need to know how to do a few of the most difficult ones so don’t stress but if you can do all the hw problems you’re probably going to do ok on the midterms/final. i fell asleep during almost all of his lectures and relied on the hw and textbook to learn the material, but i still felt like the lectures were worth going to to know what he covers since the syllabus isn’t 100% accurate and the stuff i was awake for was helpful sometimes though usually i didn’t get it until i did the hw, the tb is ok but not great. also he can be p funny to observe bc of the way he talks and moves idk how to describe it you have to see it yourself if you wanna nap too his lectures will lull you to sleep asap. discussion is not really worth it if you don’t want to go don’t bother unless your ta is good but i don’t think there were any good tas this quarter, go to his office hours if you need help he will usually do a similar problem if it’s a hw question and it really helps clarify if you’re confused but it’s only 30 min so there’s not a lot of time if you need a lot of help. the class isn’t easy but the other reviews and marengon’s p low rating makes it seem worse than it is. there were two grading schemes and one dropped your lowest midterm, he also drops your lowest hw grade, the two schemes don’t really make a difference unless you fail a midterm but he will take the highest grade of two. the curve for the class isn’t thicc at all though; for reference i got a b+, a-, and a- on the two midterms and final respectively and ended with an a, so there is a curve but it only bumps you up a little. in general the class was ok, the hw does take awhile and the material can be difficult but the professor is a decent and competent lecturer, the practice exams prepare you for the midterms/final, and the workload is manageable

Selling Textbook PDF (required for HW & Quiz):
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When I saw the reviews Prof Marengon has on bruinwalk, I was scared to death to take his class. But, in my opinion, the reviews are not a good representation of marengon as a professor as ( i think) the low rating is due to the material being hard for some people. It is a demanding class, but it can be managed very well. Everything is in the textbook and all the questions on the exam look exactly like the one's in the textbook. I adored this class because I thought the topics were super interesting and really fun in comparision to 31A. Yet, I am quite good at math so this might not be true for everyone. At the end, all I'm saying is that Marengon is a very acceptable professor. yes, he is not the best (If hear "can you hear me?" one more time I'm going to lose it), but he is very fair. Nevertheless, this class is curved like any math class, so it can get tough. Just do the question he assigns and ask friends to help you if you're struggling.
all in all great experience and I am going to miss sequences and series haha