Question

If  2  4  6  x  14  28   30 Then, x³+ 2 x+1 = ?

In each of the following questions a number series is given.  One term of the series is denoted by
X. You have to calculate the value of  X and by using the value of  X,  you have to replace the question mark (?) in the following questions :
A 1,921
B 1,753
C 1,563
D 1,892
E None of these
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