Question

show that 0.001728 is a cube root of a rational number

Answer 1

0.001728 = 1728/1000000

                = 27/15625

When we raise this number to power 3, we get:

(27/15625)³ = 19683/3814697265625


Meaning 0.001728 is the cube root of19683/3814697265625 which is a rational number

A rational number is a number that can be expressed as a/b where a and b are integers.
  

Answer 2

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