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Aug
6
comment What causes student errors on a problem involving differentiating a factorial?
Indeed, that's very true.
Aug
5
comment What causes student errors on a problem involving differentiating a factorial?
Your remarks are relevant, but my respondents included high school maths teachers as well.
Aug
5
comment What causes student errors on a problem involving differentiating a factorial?
@Jeromy, I assumed that students know the key fact in Point 3 very well. The fact that a function isn't continuous (or differentiable) if it has jumps is taught in high school calculus, typically.