Last updated on May 26th, 2025
A number we multiply by itself three times to get the original number is its cube root. It has various uses in real life, such as finding the volume of cube-shaped objects and designing structures. We will now find the cube root of 788 and explain the methods used.
We have learned the definition of the cube root. Now, let’s learn how it is represented using a symbol and exponent. The symbol we use to express the cube root is the radical sign (∛), and the exponent we use is ⅓. In exponential form, ∛788 is written as 788^(1/3). The cube root is just the opposite operation of finding the cube of a number. For example: Assume ‘y’ as the cube root of 788, then y^3 can be 788. Since the cube root of 788 is not an exact value, so we can write it as approximately 9.284.
Finding the cube root of a number is to identify the number that must be multiplied three times resulting in the target number. Now, we will go through the different ways to find the cube root of 788. The common methods we follow to find the cube root are given below: - Prime factorization method - Approximation method - Subtraction method - Halley’s method To find the cube root of a non-perfect number, we often follow Halley’s method. Since 788 is not a perfect cube, we use Halley’s method.
Let's find the cube root of 788 using Halley’s method. The formula is ∛a ≅ x((x^3 + 2a) / (2x^3 + a)) where: a = the number for which the cube root is being calculated x = the nearest perfect cube Substituting, a = 788; x = 9 ∛a ≅ 9((9^3 + 2 × 788) / (2 × 9^3 + 788)) ∛788 ≅ 9((729 + 2 × 788) / (2 × 729 + 788)) ∛788 ≅ 9.284 The cube root of 788 is approximately 9.284.
Finding the perfect cube of a number without any errors can be a difficult task for the students. This happens for many reasons. Here are a few mistakes the students commonly make and the ways to avoid them:
Imagine you have a cube-shaped toy that has a total volume of 788 cubic centimeters. Find the length of one side of the cube, which is equal to its cube root.
Side of the cube = ∛788 = 9.284 units
To find the side of the cube, we need to find the cube root of the given volume. Therefore, the side length of the cube is approximately 9.284 units.
A company manufactures 788 cubic meters of material. Calculate the amount of material left after using 200 cubic meters.
The amount of material left is 588 cubic meters.
To find the remaining material, we need to subtract the used material from the total amount: 788 - 200 = 588 cubic meters.
A bottle holds 788 cubic meters of volume. Another bottle holds a volume of 100 cubic meters. What would be the total volume if the bottles are combined?
The total volume of the combined bottles is 888 cubic meters.
Explanation: Let’s add the volume of both bottles: 788 + 100 = 888 cubic meters.
When the cube root of 788 is multiplied by 3, calculate the resultant value. How will this affect the cube of the new value?
3 × 9.284 = 27.852 The cube of 27.852 = 21,569.6
When we multiply the cube root of 788 by 3, it results in a significant increase in the volume because the cube increases exponentially.
Find ∛(400 + 388).
∛(400 + 388) = ∛788 ≈ 9.284
As shown in the question ∛(400 + 388), we can simplify that by adding them. So, 400 + 388 = 788. Then we use this step: ∛788 ≈ 9.284 to get the answer.
Cube root: The number that is multiplied three times by itself to get the given number is the cube root of that number. Perfect cube: A number is a perfect cube when it is the product of multiplying a number three times by itself. A perfect cube always results in a whole number. For example: 2 × 2 × 2 = 8, therefore, 8 is a perfect cube. Exponent: The exponent form of the number denotes the number of times a number can be multiplied by itself. In 788^(1/3), ⅓ is the exponent which denotes the cube root of 788. Radical sign: The symbol that is used to represent a root is expressed as (∛). Irrational number: The numbers that cannot be put in fractional forms are irrational. For example, the cube root of 788 is irrational because its decimal form goes on continuously without repeating the numbers.
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
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