 Hi and how are you all today? I am Priyanka and let us discuss the following question. Say evaluate. The first thing which we need to evaluate is eat factorial and the second thing is 4 factorial minus 3 factorial. Now the key idea behind this question is that whenever we need to find factorial of a number that is n factorial we know that we will multiply 1 with 2 with 3 with 4 with as long as we reach a number that is n minus 1 multiplied by n. Now this key idea will be more clearer to you when you will be start doing the question. The first part which we need to do is to find 8 factorial. Now we will be multiplying all natural numbers from 1 to 8 to get 8 factorial. It will be 1 multiplied by 2 multiplied by 3 multiplied by 4 with 5 with 6 with 7 till 8. So what we have done over here we have multiplied all natural numbers from 1 to 8 to get 8 factorial and the answer comes out to be 40320. So our answer that is multiplying all these numbers gives us 40320 as our required answer to the first part. Now in the second part we need to find out 4 factorial minus 3 factorial. Firstly we will find out 4 factorial that will be multiplying all natural numbers from 1 to 4 that gives us the answer as 24 and to find out 3 factorial it will be 1 multiplied by 2 multiplied by 3 that gives us the answer as 6. So further we need to find out exactly 4 factorial minus 3 factorial that will be 24 minus 6 we have substituted the value of 4 factorial as 24 and 3 factorial as 6 and we have 24 minus 6 which gives us 18. So this is our required answer to the second part. This completes our question. I hope you enjoyed and now you are well versed with the expansion of factorial notation of n right. Bye for now.