כיצד לחשב את Cube Root
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The cube root of a number x is a value a such that a³ = x. In other words, you are looking for the number that, multiplied by itself three times, gives you x. Cube roots can be positive, negative, or zero, unlike square roots.
מדריך שלב אחר שלב
- 1Express the number as a product of prime factors
- 2Group prime factors into sets of three
- 3Take one factor from each group of three
- 4Multiply the results — that is the cube root
Worked Examples
קלט
∛64
תוצאה
4
Because 4 × 4 × 4 = 64
קלט
∛-27
תוצאה
−3
Because (−3)³ = −27
קלט
∛125
תוצאה
5
Because 5 × 5 × 5 = 125
קלט
∛1000
תוצאה
10
Because 10 × 10 × 10 = 1,000
קלט
∛10
תוצאה
2.15443…
Not a perfect cube — irrational result
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