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Jcarreno
Level 1
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Solved!

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.

 

Cheers. 

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2 REPLIES 2
BartdB
Level 9
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Message 2 of 3
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Hi,

 

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

 

 

1.06

Y^x

3

+/-

=

 

and you should get 0.8396..

 

 

-Bart
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calculator enthusiast
Jcarreno
Author
Level 1
5 2 0 1
Message 3 of 3
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That's it! Thank you so much! 

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