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

Tea shared this problem 3 years 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.