Question

Convert the following products into factorials.: $1\times 2\times 3\times 4\times 5\times 6\times 7$

Answer 1

The product $1\times 2\times 3\times 4\times 5\times 6\times 7$ is nothing but $7!$ as $n!$ is given by,

$n!=n\times (n-1)\times (n-2)\times ....\times 3\times 2\times 1.$