Question

A sequence is defined by the formula f(n+1)=f(n)-3. If f(4)=22, what is f(1)? 10 13 31 034​

Answer 1

f(1) = 31

Explanation:

f(n+1) =f(n) -3

f(4) = f(3 + 1) = f(3) - 3

f(3)- 3 = 22

f(3) = 22 +3

f(3) = 25

The previous term {f(3)} is got by adding 3 to next term {f(4)}

f(2) = 25 + 3 = 28

f(1) = 28 + 3 = 31