Press and hold ON, Press and hold -, release ON key, release - key. In response to message #1 by Dirk (Japan)Īssuming that you're used to FIX notation, press Message #2 Posted by George Bailey (Bedford Falls) on, 6:56 a.m., I just use it for simple addition/subtraction/multiplication/division.) That's just way above my head! (This scientific calculator was given to me as a gift when I was a teenager. My son was playing with it the other day and now the cleared readout remains as follows: Message #1 Posted by Dirk (Japan) on, 6:33 a.m.Ĭan anyone tell me how I can make the view on my hp11c "normal" again? For example, if there are two solutions, one positive and one negative, and you find the positive one, enter a negative number for the start point to find the negative answer.īuy a Casio fx-991EX calculator on Amazon using this affiliate link to help support this site.How to reset my hp11c The Museum of HP Calculators To find another value, change the start point at step 4.
If you wish to use more than one variable, you need to use the quadratic equation solve.įurthermore, the Newton-Raphson numerical method only returns one value.
The variable can be used multiple times, as shown in this example, however you can’t use two or more variables such as x and y. The difference between the left expression and the right expression is shown as the solution to L–R.Ĭaveats: As mentioned, this only works with equations with one variable. The first value of x as found by the numerical method will be provided on the screen and is saved to the X variable. The current value of X is displayed for reference and will be used if no new value is provided. This Casio calculator uses Newton-Raphson numerical method solving for x. A memory reset will return the HP 48G calculator to its factory-default state, which erases all stored user memory. If applicable, enter a number as the starting point.shift-solve to enter equation solve by pressing SHIFT CALC.An X is inserted for variable that you wish to solve. Because the equation solver uses a numerical method, it only works with equations with a single variable, but can find multiple values.įor example, I will solve the following equation for x: Once the equation has been entered, the calculator uses the Newton-Raphson numerical method to solve the equation. Solving equations is possible with the equation solver in the fx-991ES PLUS or fx-991EX calculator’s shift-solve functionality.
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