- This topic has 5 replies, 2 voices, and was last updated 1 year ago by
John Moffat.
John Moffat.-
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ythomas
- Topics: 15
- Replies: 18
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Hi sir,
The actual rate of learning on the calculator for r^4 of 0.375 is for example.. ?(?(0.375)) =0.75
But what if I want to find r^3 of 0.375, how would I work it out on the calculator?
John Moffat
- Topics: 57
- Replies: 49595
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You need a scientific calculator which will have a button on it for calculating the x’th root.
There is a scientific calculator in the CBE software that you can use, and this has that button.
ythomas
- Topics: 15
- Replies: 18
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Hi sir…
I’ve found a way to do it e.g
8a(r^3)=34.3
8(12.5)((r^3)=34.3
r=34.3/(8*12.5))^(1/3)
=0.70John Moffat
- Topics: 57
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That is fine. Taking something to the power of 1/3 is the same as taking the third root. (Just as taking something to the power of 1/5 is the same as taking the 5th root)
It doesn’t matter which you do (although if your calculator has a button that lets you take something to the power of 1/3 then it will also have a button that lets you take the third root 🙂 )
ythomas
- Topics: 15
- Replies: 18
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No my calculator doesn’t allow me to do the root.
Thank you for your help…
John Moffat
- Topics: 57
- Replies: 49595
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You are welcome (it should be above the button that lets you take any power – you press the button that says ‘2nd’ on it, and then the power button to take an nth root)
ythomas
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