MathDB

188

Part of 1951 Moscow Mathematical Olympiad

Problems(1)

MMO 188 Moscow MO 1951 x^{12} - x^9 + x^4 - x + 1 > 0

Source:

8/6/2019
Prove that x12−x9+x4−x+1>0x^{12} - x^9 + x^4 - x + 1 > 0 for all xx.
algebrainequalities