负零点四的二零零七次方乘负二又二分之一的二零零八次方的积是多少?要过程!

2025-05-21 18:03:42
推荐回答(1个)
回答1:

[-0.4]^2007x[-2.5]^2008

=-0.4^2007x2.5^2007x2.5

=-[0.4x2.5]^2007x2.5

=-2.5