Final answer:
The cumulative distribution function (CDF) of xy can be calculated by integrating the probability distribution function (PDF) over the desired range.
Step-by-step explanation:
The cumulative distribution function (CDF) of xy is denoted as P(XY < x) and it gives the probability that the random variable XY is less than x. To calculate the CDF of XY, you need to have the probability distribution function of XY. Once you have the PDF, you can integrate it over the desired range to obtain the CDF.