A.1                                    B.                                    C.                             D.

34. 函数 ln(1+x) 的展开式 ln(1+x)= 的收敛区间是 (         )

A.(-1,1)                         B.[-1,1]                         C.[-1,1]                  D.(-1,1]

35. 函数 lnx 按 (x-1) 幂的级数展开式是 (         )

A.                                    B.

C.                                    D.

36. 设 z=ln(x+e ), 则 (         )

A.                                                      B.

C.                                                   D.

37. 设 z=sin(x²-y²) 则 (         )

A.-sin(x²-y²)                                                     B.sin(x²-y²)