The sum of infinitesimal functions may be infinitesimal functions, or functions whose limit is constant So is it possible to get an infinite function? If so, please give a counter example If not, please give me the reason Please pay attention to the tone when answering. I'm very vulnerable and can't stand being told that I'm stupid Note: the function independent variable tends to a certain point

The sum of infinitesimal functions may be infinitesimal functions, or functions whose limit is constant So is it possible to get an infinite function? If so, please give a counter example If not, please give me the reason Please pay attention to the tone when answering. I'm very vulnerable and can't stand being told that I'm stupid Note: the function independent variable tends to a certain point

With x + x ^ (1 / 2) + +x^(1/n)+… take as an example
Obviously, x ^ (1 / N) is infinitesimal when x tends to zero
Obviously, x + x ^ (1 / 2) + +x^(1/n)+… When x is greater than 0, it diverges to infinity