CLASS-8
CUBE & CUBE ROOTS

CUBE & CUBE ROOTS 

If a natural number is multiplied by itself three times, the results will be called considered as a Cubed Number, also called a Perfect Cubed, for example, 5 X 5 X 5 = 5 = 125. So, 125 will be called as Perfect Cube and 5 will be called Cube Root of 125. The symbol for cube roots ∛  or ( )1/3.

Thus we can express or write as, 125 = 5= 5  or  (125)1/3 = (5)1/3 = 5

There are some more example for better understanding –

Example.1) 512  = ∛8ᶟ = 8  or  (512)1/3 = (8)1/3 = 8

Example.2) 1000  = ∛10ᶟ = 10  or  (1000)1/3 = (10)1/3 = 10

Example.3) 343  = ∛7ᶟ = 7  or  (343)1/3 = (7)1/3 = 7

Example.4) 3375  = ∛15ᶟ = 15  or  (3375)1/3 = (15)1/3 = 15

Example.5) (-729) = ∛(-9)ᶟ = -9  or  (-729)1/3 = (-9)1/3 = -9