How to find cube root of a number which is not a perfect cube
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hii gyes......
I calculate cube root of any number by hand or even mentally.
Ex. To find cube root of say n= 723456.
723456 = 723.456*1000
Cube root of 723456 = cube root of 723.456 * 10
Cube root of 723.456 ?
Make an estimate of the root.
Preferably an integer by which you can easily divide the given number.
10^3 = 1000.
So root is less than 10.
Let the estimate be 9.
723.456/9 = 80.384
80.384/9 = 8.93156
Take average of 9,9 and quotient 8.93156.
It is 8.97718
Cube root of 723456 = 8.97718*10 = 89.7718.
I calculate cube root of any number by hand or even mentally.
Ex. To find cube root of say n= 723456.
723456 = 723.456*1000
Cube root of 723456 = cube root of 723.456 * 10
Cube root of 723.456 ?
Make an estimate of the root.
Preferably an integer by which you can easily divide the given number.
10^3 = 1000.
So root is less than 10.
Let the estimate be 9.
723.456/9 = 80.384
80.384/9 = 8.93156
Take average of 9,9 and quotient 8.93156.
It is 8.97718
Cube root of 723456 = 8.97718*10 = 89.7718.
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