By the second part you mean the part that said show it was less than 2?
Notice that a/(b+c) < 2a/(a+b+c) if a,b,c are the sides of a triangle.
(This follows from the fact that if a/b<c/d, a/b < (a+c)/(b+d) < c/d)
The result follows.
(There are other ways to do it, I know, but that for mine is the easiest way)
Notice that a/(b+c) < 2a/(a+b+c) if a,b,c are the sides of a triangle.
(This follows from the fact that if a/b<c/d, a/b < (a+c)/(b+d) < c/d)
The result follows.
(There are other ways to do it, I know, but that for mine is the easiest way)