Logarithmic function, F 1 2, A \ r – Casio fx-570MS User Manual
Page 17: Example
– 14 –
Logarithmic Function
Determine the value of log
2
.
• This calculator has two logarithmic functions: log whose base is
e
(natural logarithm),
and ln whose base is 10 (common logarithm).
• When the base is something other than that described above, the following formula can
be used to convert the base: When a > 0, b > 0, M > 0 and a b 1, use log
a
M =
(log
b
M)/(log
b
a) for the calculation.
1
.
Enter the COMP Mode.
F 1
2
.
Determine log
2
= (log )/(log 2).
R
128
a \ R
2
=
Result:
log
2
= log /log 2 = –7
]
Example
Example
Explanation
Explanation
Operation
≠
≠
1
128
1
128
1
128
1
128
1
128