Question

1.997⁵精确到0.001的近似值为…(    )

A.31.760                  B.31.761             C.31.762              D.31.763

Answer 1

解析:1.997⁵=(2-0.003)⁵=2⁵-·2⁴·0.003+·2³·0.003²-·2²·0.003³+…≈32-0.24+0.000 72≈31.761.

答案:B