# Logarithmic function doesn't go infinite (see the given file).

Tea shared this problem 10 months ago
In Progress

If you saw the given file you could see that exp function goes to infinite on the x-axis, but log function doesn't go infinite on the y-axis. Do you know that problem? And can you help me with that? 1

Hi Tea,

that is only a problem of your expaction, not a problem of GeoGebra.

You know, that:

• log<sub>5</sub>(1)=0
• log<sub>5</sub>(5)=1
• log<sub>5</sub>(25)=2
• log<sub>5</sub>(125)=3
• log<sub>5</sub>(625)=4
• log<sub>5</sub>(3125)=5 ....

So the function goes to infinite, really :smile: , but only very slow.

Greetings

mire2 1

Okay, but I think that the graph of log(5,x) must go to the end of the screen. Since x=0 is an asymptote it follows that the whole graph needs to be near the asymptote. If you write log_5 x in the following window https://www.desmos.com/calculator the graph si always near the y-axis.

Because of that, I thought that GeoGebra's graph is something wrong. Sorry.

Cheers,

Tea. 1

OH, I thougt that this effect is caused by the limited precision of calculations by the computer or rather GeoGebra. 