Casio fx-9860G SD - Manual (Page 87)

20050401
k Logarithmic and Exponential Functions
• Be sure to specify Comp for Mode in the Setup screen.
Example Operation
log 1.23 (log
10
1.23) = 0.08990511144 l1.23w
log
2
8 = 3
K
4(CALC)6(g)4(logab)2,8)w
4(MATH)2(logab) 2e8w
In 90 (log
e
90) = 4.49980967 I90w
10 1.23 = 16.98243652 !l(10 x )1.23w
(To obtain the antilogarithm of common
logarithm 1.23)
e 4.5 = 90.0171313 !I( e x )4.5w
(To obtain the antilogarithm of natural
logarithm 4.5)
(–3) 4 = (–3)
Ч (–3) Ч (–3) Ч (–3) = 81 ( -3)M4w
–3 4 = –(3
Ч 3 Ч 3 Ч 3) = –81 -3M4w
1
7 (= 123 7 ) = 1.988647795
7! M(
x
)123w
123
!M(
x
)7 e123w
2 + 3
× 3 – 4 = 10 2+3*3! M(
x
)64-4w* 1 64
2+3*!
M(
x
)3 e64e-4w
2-4-5
Function Calculations
* 1 ^ ( x y ) and x take precedence over
multiplication and division.
# You cannot use a differential, quadratic
differential, integration, Σ, maximum/minimum
value, Solve, RndFix or log ab calculation
expression inside of a log ab calculation term.
# The Linear input mode and Math input mode
produce different results when two or more
powers are input in series, like: 2
M3M2.
Linear input mode: 2^3^2 = 64
Math input mode: = 512
This is because the Math input mode internally
treats the above input as: 2^(3^(2)).