Mathematics: How are the entries of the matrix named by position?

6720Step-by-step explanation:The number of permutations of n things taken r at a time is given by the following formula:Similarly, for n=8 and r=5, the number of permutations of 8 things taken 5 at a time will be:Hence,...

How are the entries of the matrix named by position?

Ответ:

live4dramaoy0yf9

20.07.2022

Mathematics

6720

Step-by-step explanation:

The number of permutations of n things taken r at a time is given by the following formula:

$^nP_r=\frac{n!}{(n-r)!}$

Similarly, for n=8 and r=5, the number of permutations of 8 things taken 5 at a time will be:

$^8P_5=\frac{8!}{(8-5)!}\\\\=\frac{8\times7\times6\times5\times4\times3!}{3!}\\\\=6720$

Hence, ^8P_5=6720

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How are the entries of the matrix named by position?

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