4 ms·
Here is an interesting observation on what you wrote: x(y) = (+/-) sqrt(y) is not valid notation. On the left hand side you are stating that x is a function
by yequalsx 9y ago
Here is an interesting observation on what you wrote:
x(y) = (+/-) sqrt(y)
is not valid notation. On the left hand side you are stating that x is a function of y. But on the right hand side your usage of (+/-) indicates that y can go to two different values. Hence x is not a function of y. To be a function one must have each input going to a distinct output.
- Chris2048 9y agoYep, that was on purpose somewhat. A choice of +/- will essentially make a restricted codomain, to positives say. That means switching the variables around switched domain/codomain. An example where they are both the same: y(x) = x + 1 <=> x(y) = y - 1