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Issues with calculating y^x

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HP 10bII+ Financial Calculator

This is my second post on trying to understand how this thing works. In working with the bond valuation formula


= Coupon * [(1-(1+i)^-n)/i]+M(1+i)^-n


I am doing each step of this equation separately because I dont know any other way for now, and my problem is when I get to the power functions.


In Excel I get these values


1.06^3 = 1.1910

1.06^-3 = 0.8396


In the calculator I get


1.06^3 = 1.1910

1.06^-3 = -1.9400 OR 0.8931


To get the first result my input is simply 1.06, red shift, y^x, -3

To get the second result my input is 1.06, red shift, y^x, red shift, open parenthesis, -3, red shift, close parenthesis 


However, neither one of them seems correct based on the results I get on excel; so the question is, what am I doing wrong? For this particular formula it seems I will have to elevate numbers to the negative power pretty often so I really need to understand how this works. 


As always, thank you all for your help in understnading this.



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I think you are using the normal minus key for the negative 3. You should use the +/- key after typing the 3, i.e.:









and you should get 0.8396..



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That's it! Thank you so much! 

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