Answer:
a. 72
Step-by-step explanation:
9!/(9-2)!
= 9 x 8 x 7! / 7!
= 9 x 8
= 72
Answer:
The answer is 72
Step-by-step explanation:
In order to resolve the expression, we have to know the factorial function.
The factorial function (with a symbol: !) says to multiply all whole numbers from our chosen number down to 1.
For example:
5!=5*4*3*2*1=120
When the exercise has a fraction with factorial functions, we usually try to simplify it, that is, we have to expand the factorial value until to get the same factorial value in the denominator or numerator:
5!/3!=[tex]\frac{5*4*3!}{3!} =5*4=20[/tex]
In this case:
9!/(9-2)!=9!/7!=[tex]\frac{9*8*7!}{7!} =9*8=72[/tex]
The final value is 72.
