a,b∈R+,abba≤(2aba+b)a+ba,b \in R_+ ,a^b b^a \le (\dfrac{2ab}{a+b})^{a+b}a,b∈R+,abba≤(a+b2ab)a+b
以上结论能否证明(或证伪)?
菜鸡大悲