Finite Math Examples

${}_{1}P_{1}$

Step 1

Evaluate ${}_{1}P_{1}$ using the formula ${}_{n}P_{r} = \frac{n!}{(n - r)!}$ .

$\frac{1!}{(1 - 1)!}$

Step 2

Subtract $1$ from $1$ .

$\frac{1!}{(0)!}$

Step 3

Simplify $\frac{1!}{(0)!}$ .

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Step 3.1

Expand $1!$ to $1$ .

$\frac{1}{(0)!}$

Step 3.2

Expand $(0)!$ to $1$ .

$\frac{1}{1}$

Step 3.3

Divide $1$ by $1$ .

$1$