(2)已知a=a,求参数的最大似然估计值。 IT(a/n若 inL(B)=na,inB-ninr(a)(nxB 2-分-之-=-受 dβ . x ˆ x n d d l nL( ) l nL( ) n l n nl n ( ) ( ) l n x x x e [ ( )] x e ( ) L( ) ( ) n i i n i i n i i x i n i n n x i n i i i 0 1 0 1 1 0 0 0 1 1 0 1 0 1 0 0 1 2 0 0 0 0                                = − =  = = − + − − = = =    = = = − − = − − = 已 知 ，求参数 的最大似然估计值