Re: FE in the morning, need help with 33s! Message #3 Posted by Norris on 30 Oct 2004, 1:20 a.m., in response to message #2 by Karl Schneider
Here is a simple example. Integrate X^2 from 3 to 5.
1. Enter the function. Hit [right-shift] EQN to enter equation mode. Hit RCL X y^x 2 to enter X^2. The X is on the 2 key.
Hit [right-shift] EQN again to exit equation mode.
2. Enter the limits of integration, from lower to upper. If you use RPN mode, it's 3 ENTER 5. For ALG mode, it's 3 x<>y 5..
3. Return to equation mode with [right-shift] EQN.
The X^2 equation entered in (1) should still be displayed.
4. While the X^2 equation is displayed, hit [right-shift] [Integral-symbol]. The integral symbol is on the e^x key in the upper left corner of the keyboard.
5. The display prompts you for the variable of integration. Hit X (which you will recall is on the 2 key).
6. Answer is 32.67.
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Obviously you could solve this problem *without* the integration function of the 33S by applying fundamental principles of calculus. Then the answer is simply 125/3 - 27/3. Any such problem on the EIT exam will also be solvable with a knowledge of basic principles and a cheap calculator.
Edited: 30 Oct 2004, 1:23 a.m.
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