Re: [Dev-C++] How connect c++ to a database?

[Peter B. <pb...@hg...>]

Richard Van Wyk wrote:
> 
> 1/x
> 
> When considering x approaching zero from the negative side (-x),
> when we reach zero, 1/x becomes positive infinity.
> because there is no -0.

In mathematics (esp. Calculus) you consider a sequence of numbers x
getting closer to zero but without ever reaching it. You can do this by
coming from the negative side (all values of x are negative) or from the
positive side (all values of x are positive). This depends on the point
of interest. That is why they (the mathematicians) often write "x -> +0"
or "x -> -0". The "->" is the mathematical symbol describing the process
"getting closer to ... but without ever reaching ...".

In the case of the function 1/x it is interesting to differentiate
between positive and negative values of x, resulting in different
limits, resp. "1/x -> -infinity for x -> -0" and "1/x -> +infinity for x
-> +0". The simple conclusion is there will be no value for x=0, 1/0 is
undefined.

Peter