College Math Teaching

October 15, 2013

What do you mean “you don’t know”???

Filed under: calculus, integrals, student learning — Tags: — collegemathteaching @ 6:38 pm


I am grading calculus II exams and the above photo looks a bit like me. I’ll calm down before I hand the exams back to the students.

But I swear: I had one student DURING THE EXAM say “hey, you can’t do \int^1_{\frac{1}{2}} \frac{1}{x} dx  because \frac{1}{x} = x^{-1} and x^{-1+1} \frac{1}{-1+1} is undefined. Yes, this person passed calculus I and yes, we did that integral in calculus I (some schools hold off and develop ln(x) = \int^x_1 \frac{1}{t} dt using the Fundamental Theorem of Calculus). And yes, previously THIS SEMESTER we did integrals like \int \frac{1}{(x-1)(x+1)} dx .



Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Create a free website or blog at

%d bloggers like this: