Evaluate the expression 9P1

9

Explanation:

The expression above signifies the Permutation expression

Permutation expression is given as nPr

The Permutation expression is calculated as:

nPr = P (n, r) = n! / (n - r) !

It the above question, we were asked to evaluate the expression 9P1

From the above question, we can see that:

n = 9 and r = 1

Therefore, the expression

9P1 = 9! / (9 - 1) !

9P1 = 9! / 8!

= 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 / 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1

= 362880 / 40320

= 9

Therefore, the evaluation of the expression 9P1 = 9