Step by step
The question
Question: find ∛8.
3√8
The small 3 says how many times.
∛8 asks: which number, times itself 3 times, makes 8?
? × ? × ? = 8
1 List the cubes
Cubes are a number times itself 3 times.
2 × 2 × 2 is 8.
3 × 3 × 3 is 27.
Cubes: 23 = 8, 33 = 27
8 is in the list: 2 × 2 × 2 is 8.
2 × 2 × 2 = 8
So ∛8 = 2.
= 2
2 Check
Let's check: 2 times itself 3 times.
We get 8.
So the answer is right!
2 × 2 × 2 = 8
Let's look back.
First: list the cubes.
Last: check.
Answer
= 2