I want check my answer in derivatives (part 2)

  • Thread starter r-soy
  • Start date
For 1, you multiplied correctly, but should simplify by combining the two x3 terms. When you differentiated, you have an error in the last term.
When you used the product rule, you differentiated incorrectly when you found u'. If u = 3 - x2, u' = -2x, not -2x-3 as you have. This is basically the same mistake that you made in the first part of this problem.

In 2, you only did this problem in one way - you didn't use the product rule. When you multiplied (x + 1/x) and (x - 1/x + 1) you have several mistakes. You ended up with two terms but there should be four.
r-soy, have you figured these out? Many times you ask a question about your work, get a reply, and then don't say anything more until you have a new question.

Want to reply to this thread?

"I want check my answer in derivatives (part 2)" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Top Threads