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Computations Involving i
If you have TI-84/83 series calculators, you are free to use i on your TI on exams & quizzes to check your answer. But, to earn any credit, you will be asked to write steps in algebra.
In each problem on exams & quizzes, directions will clearly tell you whether you can write the answer straight from the TI or you must show all hand-computations.
If you have TI-84/83 series calculators, you are free to use i on your TI on exams & quizzes to check your answer. But, to earn any credit, you will be asked to write steps in algebra.
In each problem on exams & quizzes, directions will clearly tell you whether you can write the answer straight from the TI or you must show all hand-computations.
| What to Enter | Screen Shots |
| Say, we want to compute the product (1 – 2i)(3 + 5i) on the TI. To enter i, press 2ND then i which is above the • (period) button. Then, you will see this: |
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Press ENTER. Then, you have the answer.  |
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| It gets even better. Enter the quotient (1 – 2i)/(3 + 5i). You can verify the result of your hand-computations. |
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| Press ENTER. Then, you will see this: What is really displayed is (–.2058···) + (–.3···) i. We need to convert the decimals to fractions. |
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Press MATH. Be sure that 1:  Frac is selected. |
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| Press ENTER. Then, you will see this: |  |
| Press ENTER again. Then, you have the answer expressed with fractions.  |
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| Be sure to write the answer in this format you see on the right: Remember, no credit will be given if you write only the answer copied from the TI. |
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| Course Info | Office Hours | Exams | LiveMath | TI | Help | |
KU | Math Dept | Home |
| KU Interactive Mathematics |
Disclaimer • Updated September 4, 2010
Email: mitsuma@kutztown.edu
Phone: +1 (610) 462-WPJW
Phone: +1 (610) 462-WPJW