HP 35s Scientific Calculator Manuel d'utilisateur télécharger pdf (Page 141)

Integrating Equations 8-7

Example: Specifying Accuracy.

With the display format set to SCI 2, calculate the integral in the expression for Si(2)

(from the previous example).

The integral is 1.61±0.0161. Since the uncertainty would not affect the

approximation until its third decimal place, you can consider all the displayed digits

in this approximation to be accurate.

If the uncertainty of an approximation is larger than what you choose to tolerate,

you can increase the number of digits in the display format and repeat the

integration (provided that f(x) is still calculated accurately to the number of digits

shown in the display), In general, the uncertainty of an integration calculation

decreases by a factor of ten for each additional digit, specified in the display

format.

Example: Changing the Accuracy.

For the integral of Si(2) just calculated, specify that the result be accurate to four

decimal places instead of only two.

Keys: Display: Description:

8

()





Sets scientific notation with two

decimal places, specifying that the

function is accurate to two decimal

places.









Rolls down the limits of integration

from the Z–and T–registers into the

X–and Y–registers.





Displays the current Equation.

 X



∫ 





The integral approximated to two

decimal places.





The uncertainty of the

approximation of the integral.

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HP 35s Scientific Calculator Manuel d'utilisateur Page 141

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