Practicing Success
The sum of the squares of three consecutive odd numbers is 2531. Find the smallest of these numbers. |
27 29 31 37 |
27 |
We have, The sum of the squares of 3 consecutive odd numbers is 2531. According to the question, ⇒ (2n - 1)2 + (2n + 1)2 + (2n + 3)2 = 2531 Simplifying the equation: ⇒ 4n2 - 4n + 1 + 4n2 + 4n + 1 + 4n2 + 12n + 9 = 2531 ⇒ 12n2 + 12n + 11 = 2531 ⇒ 12n2 + 12n - 2520 = 0 Dividing both sides of the equation by 12: ⇒ n2 + n - 210 = 0 Now, we can factorize the quadratic equation: ⇒ (n + 15)(n - 14) = 0 So, we have two possible solutions for n: n = -15 and n = 14. However, n represents an integer, so the valid solution is n = 14. Now, we can find the three consecutive odd numbers: First odd number: 2n - 1 = 2(14) - 1 = 27 Second odd number: 2n + 1 = 2(14) + 1 = 29 Third odd number: 2n + 3 = 2(14) + 3 = 31 So the smallest odd number is = 27 |