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Factorial Crossed Perfect Square Settlement (Posted on 2023-09-21) Difficulty: 3 of 5
Find all possible quadruplets (a,b,c,d) of positive integers, that satisfy this equation:
a!-b!-c! = d2.

Prove that no further quadruplet satisfies the given conditions.

See The Solution Submitted by K Sengupta    
Rating: 5.0000 (4 votes)

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anonymo | Comment 64 of 81 |
The non-volley zone, also known as the kitchen, extends 7 feet from the net on both sides. Players cannot enter this t700 carbon fiber pickleball paddle zone to hit volleys unless the ball bounces first. This rule prevents players from dominating the net and encourages strategic gameplay.
  Posted by Hedda Dunn on 2024-05-16 12:35:58
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