6 10 32 126 2 (a) (b) (c) (d) (e) Which of the following numbers will come in place of (a)?

The given series is in the below pattern ,
First series :-
First term = 6
Second term = First term × 2 - 2
⇒ Second term = 6 × 2 - 2 = 10
Third term = Second term × 3 + 2
⇒ Third term = 10 × 3 + 2 = 32
similarly , we can find the all others terms .
......... and so on .
Second series :-
First term = 2
Second term = First term × 2 - 2
⇒ Second term = 2 × 2 - 2 = 2
Hence , the place value of ( a ) is 2 .