Recent content by Nevetsman

  1. N

    Solid sphere inside a hollow sphere.

    If this is a web-based problem, you may have used the incorrect significant figures. Since the radius is only 1 significant figure of accuracy, your answer should be only 1 sig. fig. when typed in. Give that a try So... -1x10^-8C I think is what you get. Steve
  2. N

    Logically Prove (A \cup B) \subseteq C

    Hi Ajsingh! I think your progression is correct except for premise 2. You say that x is an element of A, AND, x is an element of B. That can be true, but it doesn't have to be true. I recommend switching the AND to an OR. After you make that change, I don't see any fault in your logic. I...
  3. N

    Solving Permutation Index Homework Problems

    Hi! I'm new to the forum so I'm still getting used to the formatting techniques... instead of using the fancy mathematical symbols, I'm going to use easier assignments. In this case, E will be my permutation symbol. Remember that the Einstein notation for vectors is incredibly useful, but...
  4. N

    Evaluating Trigonometric Limits

    Hello! I'm new to this forum, and was passing through the threads when I found your post. I have a hint! In fact, the lim(x->0) of sin(x)/x is 1! When finding limits the first thing to do is plug in the limit to observe how the function behaves. In this situation, when you plug 0 in for...