MathDB

5

Part of PEN G Problems

Problems(1)

G 5

Source:

5/25/2007
Let a,b,c a, b, c be integers, not all equal to 0 0. Show that \frac{1}{4a^{2}\plus{}3b^{2}\plus{}2c^{2}}\le\vert\sqrt[3]{4}a\plus{}\sqrt[3]{2}b\plus{}c\vert.
Irrational numbers