Question

Do you remember function notation?Consider the function f(n) = 3n - 7. This function takes an input, multiplies is bythree, then subtracts 7.

Answer 1

The given expression is

`f(n)=3n-7`

Now, we need to find f(5) - f(4). In other words, we need to find the value of the function when n=5 and n=4, then we subtract them.

Finding f(5)

`f(5)=3(5)-7=15-7=8`

Finding f(4)

`f(4)=3(4)-7=12-7=5`

Then, we subtract to get the answer

`f(5)-f(4)=8-5=3`

Therefore, the answer is 3.