Introduction: Happy Wedding Equation

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About: I am a student majoring in nuclear power, quantum energy engineering, particle beam engineering in Japan.

Celebrate geekly with math when your friend gets married .

Step 1: Equation

This is Happy Wedding Equation.

Step 2: F(n)

Let's solve f (n) using Euler's formula.

Step 3: Permutation and Combination

Next, let's represent permutation and combination using the factorial symbol.

Step 4: Final Step

Finally, transforming the formula...