In Objective 14, you learn about factorials.
(when you see something like 5! + 4!)
I'll do an easy one,
if you see 4! that means that you take all the positive intergers less than or equal to 4, and multiply them. This gives you a result of 4*3*2*1=24
There is a special case when you have 0! though. 0! is defined to have a value of 1. Ok, now that I got that down, I'll do a practice question.
6!+4! (a) 744 (b)1488 (c)17 280 (d)34 560
To start off, 6! is 6*5*4*3*2*1, which is 720,
and 4! is 4*3*2*1, which is 24
and 720+24 is of course 744
Therefore the answer is (a) 744
Hope that helped,
Aaron
