Question

series complete 4,5,12,39,160,?

Answer 1

hey here we note that

4×1+1=5
5×2+2=12
12×3+3=39
39×4+4=160
160×5+5=805

hope u understand

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Answer 2

Heya user ,
Here is your answer !!

The series 4 , 5 , 12 , 39 , 160 follows the given rule :-
the term ( n ) to be obtained is multiplied the ( n-1 )th term into ( n-1 ) and adding ( n-1 ) .

4*1 + 1 = 5
5*2 + 2 = 12
12*3 + 3 = 39
39*4 + 4 = 160
160*5 + 5 = 805
805*6 + 6 = 4836
4836*7 + 7 = 33859
and so on and so forth ...

So , the series is 4 , 5 , 12 , 39 , 160 , 805 , 4836 , 33859 , ... .

Hope it helps !!