CAS Simplify(log10) always changes to LN

[DrD]

(06-21-2018 06:50 PM)scropsey Wrote:  Is there a way to have the CAS simplify result in the base that is used?

Every expression I have tried changes the base to LN.

Example: simplify ( log10(2) + log10(6) ) results in (LN(2) + LN(6))/(LN(2) + LN(5))

I am looking to use it as a way to introduce/reinforce the properties of logs.

Using the approx() command:

Number format: FIXED 2
approx(LOG(2)+LOG(6)); // ==> 1.08
approx(((2*ln(2)+ln(3))/(ln(2)+ln(5)))); // ==> 1.08
alog10(1.08); // ==> 12 (Using Ans1 as argument)

[CAS]
approx(log10(2)+log10(6)); // ==> 1.08
alog10(1.08); // ==> 12 (Using Ans1 as argument)

-Dale-