函數(shù)的單調(diào)遞減區(qū)間為             , 極大值為                ,極小值為                 .

函數(shù)的單調(diào)遞增區(qū)為_(kāi)_______，單調(diào)遞減區(qū)間為_(kāi)_______，極大值為_(kāi)_______，極小值為_(kāi)_______。

函數(shù)f(x)＝x3－3ax＋b(a>0)的極大值為6，極小值為2，則f(x)的單調(diào)遞減區(qū)間是______．