Question

If f(1)=9f and f(n)=−2f(n−1)−1 then find the value of f(4)

Answer 1

f(4)= 36

f(4) = 7n-7

Explanation:

f(4)= 9(4)

36= f(4)

f(4) = - 2(4)(n-1)-1

8(n-1) - 1

7 (n-1)

7n-7 = f(4)