The first four terms of a sequence are shown below:

7, 4, 1, -2

Which of the following functions best defines this sequence?

A f(1) = 7, f(n + 1) = f(n) + 3; for n ≥ 1

B f(1) = 7, f(n + 1) = f(n) - 3; for n ≥ 1

C f(1) = 7, f(n + 1) = f(n) - 4; for n ≥ 1

D f(1) = 7, f(n + 1) = f(n) + 4; for n ≥ 1

Question

The first four terms of a sequence are shown below:

7, 4, 1, -2

Which of the following functions best defines this sequence? 

A f(1) = 7, f(n + 1) = f(n) + 3; for n ≥ 1 

B f(1) = 7, f(n + 1) = f(n) - 3; for n ≥ 1 

C f(1) = 7, f(n + 1) = f(n) - 4; for n ≥ 1 

D f(1) = 7, f(n + 1) = f(n) + 4; for n ≥ 1

hartnn · Answer

could you find the pattern in your sequence ??
Hint : there is a number which you subtract from each term, and you will get next term.
which number is that ?