Let $ X = x i+ y j+z k$, and $r=||X||$. Prove that $\nabla (\frac{1}{r})=-\frac{X}{r^3}.$
Answer
Answers can only be viewed under the following conditions:
- The questioner was satisfied with and accepted the answer, or
- The answer was evaluated as being 100% correct by the judge.

4.8K
The answer is accepted.
Join Matchmaticians Affiliate Marketing
Program to earn up to a 50% commission on every question that your affiliated users ask or answer.
- answered
- 724 views
- $15.00
Related Questions
- Optimization Quick Problem
- Find the quadratic approximation of the following functions at the given points
- What is f(x). I've been trying to understand it for so long, but I always get different answers, I feel like I'm going crazy. Please someone explain it and read my whole question carefully.
- Vector Sketching
- Basic calc question
- Need help with this calculus question please
- Determine where the following function is discontinuous
- Complex Variables