数学分数指数幂的运算,谢谢哈,求解答

2025-12-06 05:35:02
推荐回答(2个)
回答1:

解:-81^(3/4) / |-2|^-3 + (16/49)^-1/2
=-27 / 8 +7/4
=-27/8+7/4
=-13/8

回答2:

=﹣27÷8+7/4=﹣13/8