Tuesday, September 6, 2022

Casio fx-991EX Classwiz Tips: Solving Inequalities

Casio fx-991EX Classwiz Tips:  Solving Inequalities


This week I am going to show some things that can be done with the Casio fx-991EX Classwiz.  


Solving Inequalities


Did you know that the Casio Classwiz can solve inequalities in the forms:


p(x) > 0

p(x) <0

p(x) ≥ 0

p(x) ≤ 0


where p(x) is a polynomial of degree 2 to 4.   The lead coefficient is nonzero.


To get there:  [MENU], [ ° ' " ] (B).


Each inequality and answers are displayed in textbook format.


Examples:


-4x^2 + 8x - 1 < 0

Result:  x < (2 - √3)/2, (2 + √3)/2 < x


-4x^2 + 8x - 1 > 0

Result:  (2 - √3)/2 < x < (2 + √3)/2


3x^4 + 0x^3 - 8x^2 - 6x + 5 ≥ 0

Result:  x≤0.5149391226, 1.8065398762≤x



Eddie


All original content copyright, © 2011-2022.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 


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