Question

If f(1)= 10 and f(n)=f(n-1)+4 then find the value of f(5)

Answer 1

f(5)=26

Explanation:

hello :

f(n)=f(n-1)+4 means : f(n)-f(n-1)=4 (comon diference for arithm - sequence)

so : f(n) =f(1)+(n-1)×4

f(n) =10+(n-1)×4

f(n) = 4n+6

f(5) = 4(5)+6 =26