Answer:
f(6) = 68
Step-by-step explanation:
f(6)
f(n+1)=f(n)-8
n = 5, so
f(6)=f(5)-8
and with n = 4
f(5)=f(4)-8 , so
f(4) = f(3) - 8
f(3) = f(2) - 8 = 100 - 8 = 92
f(3) = 92
Then, we can go and find the result
f(4) =[92] - 8 = 84
f(5)=[84] - 8 = 76
f(6) = [76] -8 = 68
