Function Notation

First post on my mentoring blog. Kind of weird trying to help my fellow classmates in their math studies based on my experiences and wisdom that I gained from taking this class last year.


Zeph,

Question #15 on exercise 2 is just simply using function notation. Since f (x) = 2x + 3 and you have to find k so that f(k+2) = k + f(k).
so we`ll work on the right side first, all you have to do is just substitute k+2 to x so you have:
2(k+2) + 3

On the other side since k is just a constant you just leave it and then again reading the function notation you need to substitute k to x so you have this:
k+ 2(K)+3

Therefore, you will end up with this kind of equation:
2(k+2) + 3 = k + 2k + 3

Then with the help of some algebra you will get this answer:
2k + 7 = 3k + 3
4 = k

-mark