Elena Baby
New member
- Joined
- Dec 12, 2019
- Messages
- 19
I have a problem:
"Prove that any normal vector of z^2=x^2+y^2 hits the z axis."
(I have translated this problem to English so forgive me if it's not understandable.)
What I did was I found the gradient which is equal to 2zk-2xi-2yj=0.
I set x and y equal to 0,and z therefore is equal to 0.
(I'm new to tangent planes and gradients btw)
Please can someone tell me where is wrong and how can I improve my answer?
"Prove that any normal vector of z^2=x^2+y^2 hits the z axis."
(I have translated this problem to English so forgive me if it's not understandable.)
What I did was I found the gradient which is equal to 2zk-2xi-2yj=0.
I set x and y equal to 0,and z therefore is equal to 0.
(I'm new to tangent planes and gradients btw)
Please can someone tell me where is wrong and how can I improve my answer?