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The NEWYES NY-991MS and CTIFREE fx-991ES PLUS calculators do not have a dedicated "FACT" button like the Casio FX-83GTX. However, you can still find prime numbers on these calculators. To find prime numbers: NEWYES NY-991MS: Press the "MODE" button. Choose "PRIME" from the list of options. Enter the desired number and press "=" to check if it's prime. CTIFREE fx-991ES PLUS: Press the "MODE" button. Select "TABLE" or "TABLESET." Input a starting point and an ending point, then observe the table for prime numbers. Although the techniques may vary from those used on the Casio FX-83GTX, they prove to be effective for prime number calculations on the designated calculators.
You should try to explore the calculator to find its capabilities. You can also read the manual. Everything is in it.
Press the Mode button, then the down arrow key. On the second page of the mode list you find 2:Verif
Write your equations first, then try to use the calculator to solve the problem. If you don't know how to do it by hand, you won't be able to ask the calculator to do it for you.
You cannot. The calculator does not have a Computer Algebra System or
CAS. If you are trying to calculate an integral over an infine interval,
you must try some high values to simulate infinity and find a value
after which the value of the integral stops changing .
Hi, If you cannot find it, buy an FX-991ES. It is solar-powerd and it has the natural text-book display, which is a novelty in calculators. I know that Staples carry the FX-991ES.
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