I think this is factorials
so an example would b....... 1*2*3*4*5.... ect
hope this helps
Answer:

Step-by-step explanation:
Hope this helps! Have a great day ahead. Happy halloween :) Stay Safe <33
Answer:
12
Step-by-step explanation:


When F = 18; d = 2


Cross multiply;
18 x 4 = K
72 = K
There the equation connecting F and
is

Now, Find F when d = 6
All you do is to substitute d = 6 in to 

Therefore;
F = 12
Please mark me brainiest if correct.
Answer:
11
Step-by-step explanation:
3/1 is the answer follow the line