Finding a cube root of a number without using calculator .

  • #1
HI EVERYONE
I was thinking if we could find a cube root without using a calculator.
square root was easy to find without calculator,but cube root i have no idea to find it.
any help??
for example(cube root of 3 or 2)
 

Answers and Replies

  • #2
finding a square root without using calculator.
 
  • #4
Svein
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A numerical recipe for calculating [itex] \sqrt[3]{a}[/itex]. Set [itex] x_{1}=\frac{a}{3}[/itex] and recursively calculate [itex]x_{n+1}=\frac{1}{3}(2x_{n}+\frac{a}{x_{n}^{2}}) [/itex]. Stop when |xn+1 - xn| is "small enough".
 
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Likes Emmanuel_Euler
  • #5
Thank you so much for help.
 

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