Question

0.95⁵精确到0.01的近似值为(    )

A.0.74            B.0.75             C.0.77              D.0.78

Answer 1

解析：0.95⁵=(1-0.05)⁵=1+×(-0.05)+×(-0.05)²+(-0.05)³+…

∵×0.05³=0.001 25＜0.005,而以后各项的绝对值更小,

∴从第四项起,均可忽略不计.

∴0.95⁵=1-5×0.05+10×0.002 5=0.775≈0.78.

答案：D