Solution Screen Contents; Continue Screen - Casio fx-991ZA PLUS II User Manual

Note
• During the time from when you press
pressing , you should use Linear Display input procedures for input.
Important!
• Depending on what you input for the initial value for X (solution variable), SOLVE may
not be able to obtain solutions. If this happens, try changing the initial value so they
are closer to the solution.
• SOLVE may not be able to determine the correct solution, even when one exists.
• SOLVE uses Newton's method, so even if there are multiple solutions, only one of
them will be returned.
• Due to limitations in Newton's method, solutions tend to be difficult to obtain for
equations like the following: y = sin(x), y = e

Solution Screen Contents

Solutions are always displayed in decimal form.
(1) Equation (The equation you input.)
(2) Variable solved for
(3) Solution
(4) (Left Side) - (Right Side) result
"(Left Side) - (Right Side) result" shows the result when the right side of
the equation is subtracted from the left side, after assigning the obtained
value to the variable being solved for. The closer this result is to zero, the
higher the accuracy of the solution.

Continue Screen

SOLVE performs convergence a preset number of times. If it cannot find a
solution, it displays a confirmation screen that shows "Continue: [=]",
asking if you want to continue.
To exit SOLVE:
(SOLVE) until you exit SOLVE by
x
, y = √x.
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