指數===help

👨🏻‍🏫 學術台數學

用戶154185

2007-01-18 3:00 am

1.
{(x-1/2) / [x^(-1 ) x^(1/4)] }^2

ans:x^0.5

回答 (3)

琴生

2007-01-18 3:09 am

✔ 最佳答案

打錯問題, 應該是{x^(-1/2)/[x^(-1) x^(1/4)]}^2

{x^(-1/2)/[x^(-1) x^(1/4)]}^2
= {x^[(-1/2)-(-1)-(1/4)]}^2
= {x^(1/4)}^2
= x^(1/2)

👍 0 👎 0

入會員

2007-01-19 1:05 am

正確ans.:
{x^(-1/2)/[x^(-1) x^(1/4)]}^2
= {x^[(-1/2)-(-1)-(1/4)]}^2
= {x^(1/4)}^2
= x^(1/2)

2007-01-28 14:01:22 補充：
good ans.

👍 0 👎 0

用戶21335

2007-01-18 4:30 am

{x^(-1/2)/[x^(-1) x^(1/4)]}^2
= {x^[(-1/2)-(-1)-(1/4)]}^2
= {x^(1/4)}^2
= x^0.5

👍 0 👎 0