(A)log|log√x+3log(x−1)1/6×log(x+2)1/3|(B)log|logx−3log(x−1)1/6×log(x+2)1/3|+c(C)log|log√x−3log(x−1)1/6×log(x+2)1/3|+c(D)log|log√x−3log(x+1)1/6×log(x−2)1/3|+c