# Thread: Help using a Casio fx-83ES to calculate a fraction as an exponent.

1. ## Help using a Casio fx-83ES to calculate a fraction as an exponent.

I am trying to teach myself algebra and I have downloaded a course book, but I arrived at the section for inputting algebra in to graphic calculators (I only own the Casio fx-83ES model) I have figured out some of the basics but I have arrived at :[e.g. 2x^2 + 3y^3 / (x+y)^1/2] could anyone please tell me how to (if at all possible) enter a fraction as the exponent (^1/2), I realise this is very basic but even the Casio user guide isn't very clear on this.

2. ## Re: Help using a Casio fx-83ES to calculate a fraction as an exponent.

Originally Posted by whammybird
I am trying to teach myself algebra and I have downloaded a course book, but I arrived at the section for inputting algebra in to graphic calculators (I only own the Casio fx-83ES model) I have figured out some of the basics but I have arrived at :[e.g. 2x^2 + 3y^3 / (x+y)^1/2] could anyone please tell me how to (if at all possible) enter a fraction as the exponent (^1/2), I realise this is very basic but even the Casio user guide isn't very clear on this.
Press the power button then enter the fraction in brackets.

3. ## Re: Help using a Casio fx-83ES to calculate a fraction as an exponent.

sorry for the terrible photo but this is what I am inputting in to the device, you can see the bracketed fraction shown as an exponent in the denominator. It is telling me there is a Math error when I try to get it to calculate. Thanks for the advice already and any in advance.

4. ## Re: Help using a Casio fx-83ES to calculate a fraction as an exponent.

Just download its manual from internet or consult with those who does it.

5. ## Re: Help using a Casio fx-83ES to calculate a fraction as an exponent.

I don't have the calculator, but note that $(x+y)^{1/2}$ is defined only if x + y ≥ 0.