Accounting for restricted x-values in fractional (linear/linear) derivatives
I was working on a problem (solution shown):
and checking my work with wolfram alpha to find that there is a "restricted x-value" constant that is added in to the end of the integral, in this case 4/9. I don't know how this value was calculated, but Wolfram has the steps it took here: http://www.wolframalpha.com/input/po...e46hi91b8&s=57
Could someone possibly explain the use of this constant and how it was calculated, since it can be eliminated anyway if C=-4/9?
Also, are there other cases when this need be calculated? Could you point me to some places where I can get some practice?
Help is greatly appreciated!