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E-13
COMP
Differential
Calculations
The procedure described below obtains the derivative of
a function.
Use the
F key to enter the COMP Mode when you
want to perform a calculation involving differentials.
COMP ............................................................
F 1
• Three inputs are required for the differential expression:
the function of variable
x, the point (a) at which the dif-
ferential coefficient is calculated, and the change in
x (∆x).
A J expression P a P ∆x T
• Example: To determine the derivative at point x = 2 for
the function
y = 3x
2
– 5x + 2, when the increase or de-
crease in
x is ∆x = 2 × 10
–4
(Result:
7
)
A
J
3
p x K , 5 p x + 2 P 2 P
2 e D 4 T =
•Input a value from 1 to 4 to select the probability
distribution calculation you want to perform.
P(t)R(t)Q(t)
• Example: To determine the normalized variate (→t) for
x = 53 and normal probability distribution P(t) for the
following data: 55, 54, 51, 55, 53, 53, 54, 52
(
→
t = Ҁ
0.284747398
, P(t) =
0.38974
)
55
S 54 S 51 S 55 S
53 S S 54 S 52 S
53 A D 4(
→
t) =
A D 1(
P(
) D 0.28 F =