why does your calculator dosnt contain the logarithm for a costum value? :)
example: 2.17 = 5.1^x ...-> x = Log_5.1 (2.17) ...-> x = 0.48
probably because, like most modern graphing calculators (excluding the TiNspire )
its difficult to code also
you can use the change of base formula in order to add custome values.
It will do this....
Hit the log key
Then ... type in 2.17, 5.1 and hit "="
It will return.....
