1964 AHSME Problems/Problem 37

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Problem

Given two positive number $a$, $b$ such that $a<b$. Let A.M. be their arithmetic mean and let $G.M. be their positive geometric mean. Then A.M. minus G.M. is always less than:$\textbf{(A) }\dfrac{(b+a)^2}{ab}\qquad\textbf{(B) }\dfrac{(b+a)^2}{8b}\qquad\textbf{(C) }\dfrac{(b-a)^2}{ab}$$ (Error compiling LaTeX. ! Missing $ inserted.)\textbf{(D) }\dfrac{(b-a)^2}{8a}\qquad \textbf{(E) }\dfrac{(b-a)^2}{8b}$

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