what is = to infinity? infinity is not a real number, for example, 1+2+3+4+5+6+7+8+9+........ will be infinity or not we don't know, but what we know is this number is closer and closer to infinity, just like when 1/(very large number) = about 0 when 1/(more large number) = closer to 0 when 1/(the greatest number possible)= infinity, but there is not a number that is the greatest so infinity does not exist, but is dose not another way, we can get it when we don't do any mathematics calculation. (sorry, my typing is very bad)