Sending the author of the present question to Math Stack Exchange is IMO an acceptable response. If the question weren't closed and I was responding, I'd advise getting together with other students to hash it out. If the student is shy as an individual before the instructor, trying coming in together as a group to see the instructor with the questions they cannot resolve. The advice given by fedja is good inasmuch as it presents an ideal model of a mathematics student.
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