2.设(X1,···,X2)是来自总体X的样本,已知总体X的分布密度函数为-|||-(x,theta )= ) theta (x)^theta -1, 0lt xlt 1 0, xnotin (0,1). .-|||-(1)求未知参数θ的矩估计和最大似然估计;-|||-(2)若有样本观测值0.20,0.36,0.30,0.54,0.60,θ的两种估计方法下的-|||-估计值.