數學開方既問題

√x4‧√x
=(x4)1/2‧(x)1/2
= x4/2‧x1/2
= x2‧x1/2
= x2+1/2
= x4/2+1/2
= x5/2


√x = x 1/2
根據指數定律am．an = am+n
所以x2‧x1/2 = x2+1/2

if the x 代表 1.then √ｘ必定＝２