What does the docsis proactive network maintenance (pnm) tool use to gather the device and network parameters that are collected, analyzed, and combined with network topology and device location to identify and isolate the source of a problem?

Find the inverse function of f(x)= 1+squareroot of 1+2x

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables