解:函数是偶函数,又f(x)在[0,+∞)上单调递减,因此f(x)在(-∞,0)上单调递增f(x-1)(x-1)²>(2x)²3x²+2x-1<0(x+1)(3x-1)<0-1x的取值范围为(-1,⅓)