Question

The first four terms of a sequence are shown below:

Answer 1

A f(1) = 9, f(n + 1) = f(n) − 4; for n ≥ 1

Answer 2

Answer:

Option A is correct.

Step-by-step explanation:

We have been given the sequence:

9,5,1,-3

We can clearly see that the next digit is four less than the previous digit.

Here first term that is a=9

So, the function would be:

$f(1)=9; f(n+1)=f(n)-4\text{for}n\geq1$

Therefore. option A is correct.

Option B and D are not correct because function is decreasing not increasing.

Option C is not correct because decreasing by 4 not 5.