Is it D?

By definition Standard deviation gives a measure how closely or widely spread the sequence is with respect to its mean.
Greater the difference between the numbers and mean, higher will be the Standard deviation.

Looking at the equations - we can say that third power of a number will give bigger numbers hence higher SD

A> sequence will be 1,4,9,16,25,36,49,64,81,100
B> Sequence will be 52, 54, 56, 58, 60, 62, 64, 66, 68, 70
C> Sequence will be 1/3, 2/3, 1, 4/3, 5/3, 2, 7/3, 8/3, 3, 10/3
D> Sequence will be -59, -52, -33, 4, 65, 156,...
E> Sequence will be 102, 104, 106, 108, 110, 112,..

Hello Bunuel !

Just one question, do the numbers that are being added/subtracted have a specific meaning?

A. \(a_n=n^2\)

B. \(a_n=2n+50\)

C. \(a_n=\frac{n}{3}\)

D. \(a_n=n^3−60\)

E. \(a_n=2n+100\)[/quote]


Kind regards!