Answer 1
This is 3840. The default is
multiply by 2, then 4, then 6, then 8, then 10, … .
answer 2
1
1×2 = 2
2×4 = 8
8×6 = 48
48×8 = 384
384×10 = 3840
12×3480 = 41760
It can be written as one of the following:
(2n)!!
(2^n) n!
Notice that!! does not mean to factor twice. Oh! means factorial. !! means something called “double factorial”.
So for n=5 (whatever you want), put:
(2^5) 5!
= 32 × (5 × 4 × 3 × 2 × 1)
= 32 × 120 = 3480
The double factorial is where you take all the others. For n=5, we can do:
(2×5)!! = 10 !!
= 10 × 8 × 6 × 4 × 2
note that we take all other factors counting backwards from 10
= 3480
Which also demonstrates how much this recursion really defines!! Occupation.
Source(s): See also:
http://en.wikipedia.org/wiki/Double_factorial#Doub…
answer 3
2×1=2
4×2=8
6×8 = 48
8×48 = 348
10×348 = 3480
12 x 3480 = 41760
answer 4
3840
1*2 = 2
2*4=8
8*6=48
48*8=384
384 * 10 = 3840
then multiply by 10 to get 3840
Answer 5
1 2 8 48 384
Answer 6
It seems to be successive multiples of 2, so 10 x 384 = 3840
Answer 7
3840…each next number is multiplied by the next number counted by two.
1 (x2) 2 (x4) 8 (x6) 48 (x8) 384 (x10) 3840.
Answer 8
3840
You multiply each term by, then 4, then 6, then 8, then 10, then 12, etc.
Answer 9
3840 followed by 46080
in statistics, this is called (perfect) autocorrelation
try a little more
Answer 10
the sequence is like this!
1×2=2
2×4=8
8×6=48
48×8=384
then..
384×10=3840
hope this helped!