The sum of three numbers is 14 and the sum of their squares is 100. Find the sum of cubes of those three numbers if their product is 24.radio_button_unchecked728radio_button_unchecked936radio_button_unchecked733radio_button_unchecked800
Question
The sum of three numbers is 14 and the sum of their squares is 100. Find the sum of cubes of those three numbers if their product is 24.radio_button_unchecked728radio_button_unchecked936radio_button_unchecked733radio_button_unchecked800
Solution
This problem can be solved using the formula for the sum of cubes, which is (a+b+c)³ = a³ + b³ + c³ + 3ab(a+b) + 3bc(a+c) + 3ca(b+c).
Given that a+b+c = 14, a²+b²+c² = 100, and abc = 24, we can substitute these values into the formula to find the sum of the cubes.
First, we need to find the value of 3ab(a+b) + 3bc(a+c) + 3ca(b+c).
This can be simplified to 3abc + 3ab² + 3bc² + 3ca².
We know that abc = 24, so 3abc = 72.
We also know that a²+b²+c² = 100, so 3ab² + 3bc² + 3ca² = 300.
Therefore, the sum of the cubes is a³ + b³ + c³ + 72 + 300 = 372 + a³ + b³ + c³.
We can find the value of a³ + b³ + c³ by subtracting 372 from the total sum of the cubes.
The sum of the cubes is therefore 372 + 24 = 396.
So, the sum of the cubes of the three numbers is 396.
Similar Questions
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is ___________.Choices:- 20 30 40 50
The expression below is a sum of cubes.125x3 + 144A.TrueB.False
Find the sum of all the three-digit numbers which are equal to 22 times the sum of their digits.
lect the correct answerA number when divided by D leaves a remainder of 8 and when divided by 3D leaves a remainder of 21 . What is the remainder left, when twice the number is divided by 3D?radio_button_unchecked13radio_button_unchecked42radio_button_unchecked3radio_button_uncheckedcannot be determined
Three numbers are in the ratio 2:3:4. The sum of their cubes is 334125. Find thenumbers
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.