How Do I change log base in Ti 83+ Calculator?

Question

or does anyone know what is Log sub 2 /sub 64

Answer 1

You mean log base 2 of 64? That's 6



To do various based logs, you have to use the change of log base formula.



log base b of x = log (x) / log (b)



You can also use a natural log, but you probably don't know what that is if you are asking this question, so just use the common log (base 10 that your calculator can do) for now.

Answer 2

Change Base Of Log

Answer 3

Log Base Change

Answer 4

Log base 2 [64] = 6



You can get logs of any base you want by remembering that

Log base A (B) * Log base B (C) = Log base A (C)

and Log base X(Y) = 1/ Log base Y(X)



So you could solve this by

Log base 2 (64) = Log base 2 (10) * Log base 10 (64) =

Log base 10 (64) / Log base 10 (2)



but it is much easier to remember that 64 = 2^6

Answer 5

You don't, unless you program it with your own custom log function. You're stuck with log sub 10 or log sub e (the ln button). However, as everyone who has answered before me has pointed out, you can use the identity log a / log b = log sub b a. You may use either the log or the ln button for this purpose.

Answer 6

You do not have to

If you want logx(y)

You can use ln y / ln x which is equal to logx(y)