Question

construct a table of variation of y'
x=x(t)=t-2
y=y(t)=t^3+t

Answer 1

I did dy/dt/dx/dt =3t^2+1

Answer 2

But when I wanted to find the values of t, I got:
t^2=-1/3
Which is not possible, right?
So idk what I did wrong or what I missed out :/

Answer 3

is y'
w.r.t. to t or x?

Answer 4

i think y wrt t...

Answer 5

They didn't specify anything, but i assume w.r.t to t

Answer 6

http://prntscr.com/4z70m2
Just did it for t>= 0 because that seemed natural
It may be specified in the problem somewhere, but you are write to point out that if dy/dt = 0, tha results in an imaginary time

Answer 7

so dy/dt > 0, Yes... I think it's probably also t >= 0
One does not generally talk about negative times

Answer 8

why dont you eliminate t

Answer 9

x= t -2
x + 2 = t

y = ( x+2)^3 +(x+2)

Answer 10

...although there's nothing wrong with that
Not sure what else to do for this problem, other than make a table with as many values as you want like on the link.

Am I missing something?

Answer 11

http://prntscr.com/4z72ht
So, that would seem to be it to me

Answer 12

i have a question

Answer 13

What is it?

Answer 14

if i were to travel faster than the speed of light will i go to the past or the future?

Answer 15

could i go somewhere inbetween? complex plane time??

Answer 16

Haha. Hm, I am not aware of any treatments of complex time. But in general, if you're traveling faster than the speed of light, you should be able to go into the past or the future doesn't really matter, depends I suppose on your direction of travel.
But I am thinking on it - relativity question.

Answer 17

I mean we already travel into the future by standing still. The only interesting direction is to travel into the past.

Answer 18

but the past i already lived, why crawl when you can fly

Answer 19

So the issue with relativity is that it's all about the relative passage of time between people in different frames of reference.

Answer 20

if north is the direction toward future and south is for past what is NE what is WEst and EAST what if even after the projection of the speed on the north and south planes there is still speed greater than the speed of light

Answer 21

I'm not sure what it would to travel into the future with a speed greater than c. I don't see why it's theoretically forbidden, but you could essentially be going into a place where the causality of what's happening with the rest of the universe is not quite catching up to you yet, but you might be entering into regions that are already in the past of other regions... It's all quite complex LOL