Answer:
Step-by-step explanation:
hello,
we can say that f(0)=23 as he has already donated $23
and as he wants to give $1 every day so f(x)-f(x-1)=1 then
f(0)=23
f(x)=f(x-1)+1
and we can compute
f(1)=f(0)+1=24
f(2) = 25
f(3)=26
etc
hope this helps
