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anemone
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Determine all positive integers $a,\,b$ and $c$ that satisfy equation $(a+b)!=4(b+c)!+18(a+c)!$.
A factorial equation is an equation that involves the factorial operation, denoted by the exclamation mark (!). The factorial of a number is the product of all positive integers less than or equal to that number. For example, 4! (read as "four factorial") is equal to 4 x 3 x 2 x 1 = 24.
To solve a factorial equation, you need to find the value of the variable that satisfies the equation. This can be done by using algebraic manipulation and simplification techniques, such as factoring, expanding, and combining like terms. It may also involve using properties of factorial, such as (n+1)! = n!(n+1), to simplify the equation.
The general form of a factorial equation is a! + b! + c! = k, where a, b, and c are variables and k is a constant. This means that the equation involves the sum of multiple factorial terms, and the goal is to solve for the values of the variables.
Yes, there are two special cases in solving factorial equations. The first is when one or more of the variables have a value of 0, which makes the factorial term equal to 1. The second is when the equation has a factorial term with a negative integer, which is undefined. In these cases, the equation can be simplified or the solution may not exist.
Yes, a factorial equation can have multiple solutions. This is because the factorial operation is not a one-to-one function, meaning that different values can have the same factorial value. However, it is important to note that not all factorial equations will have multiple solutions, and some may have no solution at all.