Chap 7
CUBES AND CUBE ROOTS
SOME IMPORTANT FACTS
1. The cube of
a number Is that number raised to the power 3.
2. A natural n
is a perfect cube , if n= m3
for some natural number m.
3. The cube of
even natural number is even.
4. The cube of
odd natural number is odd.
5. The cube
root of number x is the number whose cube is x. it is denoted by 3√x.
6. For finding
the cube root of a perfect cube, resolve
it into prime factors, make triple of similar factors and take the product of
prime factors, choosing one out of every triple.
7. For any
integer a and b, we have
i)
3√ab = 3√a x 3√b
ii)
3√a/b = 3√a/3√b
