power functions on TA BAII plus professional calculator

CFA Level I
#1

Hi All,

I think my calculator is behaving funny or I am doing something wrong while calculating nth root of any number.

For eg, If I want to calculate 3rd root of 125, I press 125 then (yx) then 3 then (+/-) and (=) and it doesnt gives me 5 as an answer. It shows 0.000000512 as an answer.

I just want to find out 3rd root of 125 or for that matter Nth root of any number.

How can I get desired result?

Thanks for your help in advance :slight_smile:

#2

I dont’ know if there is a better way but I’ve always done:

125

(yx)

( 1 / 3 )

=

Including the parenthasis above for 1/3 calculation

#3

Hi hpracing007,

Thanks for prompt response, yes your method does work :slight_smile:

Thank you!

#4

125

yx

3

1/x

=

also will give you the same answer.

#5

Or take 125 to the .333333333 power.

#6

Nimtree - what you are calculating with your keystrokes is y^(-3), which is 1/y^3

This is not equal to the third root of y

#7

@ busprof

Thanks for highlighting that…I realised my mistake :slight_smile: