f(x)=5+1/x-------------------------------------------------------------------- x | 1 | 10 | 100 | 1000 | 10 000 | 100 000 f(x) | 6 | 5,1 | 5,01 | 5,001 | 5,0001 | 5,00001----------------------------------------------------------------------a=+∞ , f(x) ---> 5---------------------------------------------------------------------- x | -1 | -10 | -100 | -1000 | -10 000 | -100 000 f(x) | 4 | 4,9 | 4,99 | 4,999 | 4,9999 | 4,99999-----------------------------------------------------------------------a= -∞ , f(x) ---> 5---------------------------------------------------------------------------------- x | 1,1 | 0,9 | 1,01 | 0,99 | 1,001 | 0,999 f(x) | 5,(90) | 6,(1) | 5,(9900) | 6,(01) | 5,(999000) | 6,(001)-----------------------------------------------------------------------------------a=1 , f(x) ---> 6