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10. Cube root by Babylonian method example ( Enter your problem )
  1. Example-1
Other related methods
  1. Square of a number
  2. Cube of a number
  3. Nth Power of a number
  4. Square root by prime factorization method
  5. Cube root by prime factorization method
  6. Nth root by prime factorization method
  7. Square root by long division method
  8. Cube root by long division method
  9. Square root by Babylonian method
  10. Cube root by Babylonian method
  11. Find the smallest number which must be Added / Substracted / Multiplied / Divided to 180 to make it perfect Square / Cube
  12. Find Least number of 4 digits which is a perfect Square

9. Square root by Babylonian method
(Previous method)
11. Find the smallest number which must be Added / Substracted / Multiplied / Divided to 180 to make it perfect Square / Cube
(Next method)

1. Example-1





1. Find Cube root of 4096 using Babylonian method, with Initial guess x0 = 15

Solution:
Babylonian method for finding cube roots by hand
`:. root (3)(4096)=?`

`x_(i+1)=(2*x_i+s/(x_i)^2)/3`

`x_0=15`


`1^(st)` iteration :

`x_1=(2*15+4096/15)/3`

`=(30+18.2044)/3`

`=(48.2044)/3`

`=16.0681`


`2^(nd)` iteration :

`x_2=(2*16.0681+4096/16.0681)/3`

`=(32.1363+15.8646)/3`

`=(48.0009)/3`

`=16.0003`


`3^(rd)` iteration :

`x_3=(2*16.0003+4096/16.0003)/3`

`=(32.0006+15.9994)/3`

`=(48)/3`

`=16`


`4^(th)` iteration :

`x_4=(2*16+4096/16)/3`

`=(32+16)/3`

`=(48)/3`

`=16`

`:. root (3)(4096)=16`

Babylonian Method Table
Iteration`x``4096/x`Average
11518.204416.0681
216.068115.864616.0003
316.000315.999416
4161616

2. Find Cube root of 216 using Babylonian method, with Initial guess x0 = 5

Solution:
Babylonian method for finding cube roots by hand
`:. root (3)(216)=?`

`x_(i+1)=(2*x_i+s/(x_i)^2)/3`

`x_0=5`


`1^(st)` iteration :

`x_1=(2*5+216/5)/3`

`=(10+8.64)/3`

`=(18.64)/3`

`=6.2133`


`2^(nd)` iteration :

`x_2=(2*6.2133+216/6.2133)/3`

`=(12.4267+5.5951)/3`

`=(18.0217)/3`

`=6.0072`


`3^(rd)` iteration :

`x_3=(2*6.0072+216/6.0072)/3`

`=(12.0145+5.9855)/3`

`=(18)/3`

`=6`


`4^(th)` iteration :

`x_4=(2*6+216/6)/3`

`=(12+6)/3`

`=(18)/3`

`=6`

`:. root (3)(216)=6`

Babylonian Method Table
Iteration`x``216/x`Average
158.646.2133
26.21335.59516.0072
36.00725.98556
4666

3. Find Cube root of 2 using Babylonian method, with Initial guess x0 = 1

Solution:
Babylonian method for finding cube roots by hand
`:. root (3)(2)=?`

`x_(i+1)=(2*x_i+s/(x_i)^2)/3`

`x_0=1`


`1^(st)` iteration :

`x_1=(2*1+2/1)/3`

`=(2+2)/3`

`=(4)/3`

`=1.3333`


`2^(nd)` iteration :

`x_2=(2*1.3333+2/1.3333)/3`

`=(2.6667+1.125)/3`

`=(3.7917)/3`

`=1.2639`


`3^(rd)` iteration :

`x_3=(2*1.2639+2/1.2639)/3`

`=(2.5278+1.252)/3`

`=(3.7798)/3`

`=1.2599`


`4^(th)` iteration :

`x_4=(2*1.2599+2/1.2599)/3`

`=(2.5199+1.2599)/3`

`=(3.7798)/3`

`=1.2599`

`:. root (3)(2)=1.2599`

Babylonian Method Table
Iteration`x``2/x`Average
1121.3333
21.33331.1251.2639
31.26391.2521.2599
41.25991.25991.2599

4. Find Cube root of 5 using Babylonian method, with Initial guess x0 = 2

Solution:
Babylonian method for finding cube roots by hand
`:. root (3)(5)=?`

`x_(i+1)=(2*x_i+s/(x_i)^2)/3`

`x_0=2`


`1^(st)` iteration :

`x_1=(2*2+5/2)/3`

`=(4+1.25)/3`

`=(5.25)/3`

`=1.75`


`2^(nd)` iteration :

`x_2=(2*1.75+5/1.75)/3`

`=(3.5+1.6327)/3`

`=(5.1327)/3`

`=1.7109`


`3^(rd)` iteration :

`x_3=(2*1.7109+5/1.7109)/3`

`=(3.4218+1.7082)/3`

`=(5.1299)/3`

`=1.71`


`4^(th)` iteration :

`x_4=(2*1.71+5/1.71)/3`

`=(3.42+1.71)/3`

`=(5.1299)/3`

`=1.71`

`:. root (3)(5)=1.71`

Babylonian Method Table
Iteration`x``5/x`Average
121.251.75
21.751.63271.7109
31.71091.70821.71
41.711.711.71





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9. Square root by Babylonian method
(Previous method)
11. Find the smallest number which must be Added / Substracted / Multiplied / Divided to 180 to make it perfect Square / Cube
(Next method)





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