如何求解分數指數。
提高到n / m的冪的基數b等於:
b N / M =(米√ b)ñ =米√(B Ñ)
例:
升至3/2的冪的基數2等於1除以3的冪的基數2:
2 3/2 = 2 √(2 3)= 2.828
帶指數的分數:
(a / b)n = a n / b n
例:
(4/3)3 = 4 3 /3 3 =27分之64= 2.37
升高到負n / m的冪的基數b等於1除以升高到n / m的冪的基數b:
b -n /米= 1 / b N / M = 1 / (米√ b)ñ
例:
升高到負1/2的冪的基數2等於1除以升高到1/2的冪的基數2:
2 -1/2 = 1/2 1/2 = 1 / √ 2 = 0.7071
升高到負n的冪的基數a / b等於1除以升高到n的冪的基數a / b:
(一/ b)- ñ = 1 /(一個/ b)ñ = 1 /(一個ñ / b Ñ)= b ñ /一個Ñ
例:
底數2乘以3的冪等於1除以底數2乘以3的冪:
(2/3)-2 = 1 /(2/3)2 = 1 /(2 2 /3 2)= 3 2 /2 2 = 9/4 = 2.25
將分數指數與相同的分數指數相乘:
一N / M ⋅ b N / M =(一個⋅ b)N / M
例:
2 3/2 ⋅3 3/2 =(2⋅3)3/2 = 6 3/2 = √(6 3)= √ 216 = 14.7
用相同的底數乘以分數指數:
一N / M ⋅一個ķ/ J =一個( N / M)+(K / J)
例:
2 3/ 2⋅2 4/3 = 2 (3/2)+(4/3) = 7.127
用不同的指數和分數乘以分數指數:
一N / M ⋅ b K /Ĵ
例:
2 3/2 ⋅3 4/3 = √(2 3)⋅ 3 √(3 4)= 2.828⋅4.327 = 12.237
將分數乘以相同的分數底數的分數:
(A / B)ñ ⋅(A / b)米=(A / B)n + m個
例:
(4/3)3 ⋅(4/3)2 =(4/3)3 + 2 =(4/3)5 = 4 5 /3 5 = 4.214
將分數與相同指數的分數相乘:
(A / B)ñ ⋅(C / d)ñ =((A / B)⋅(C / d))ñ
例:
(4/3)3 ⋅(3/5)3 =((4/3)⋅(3/5))3 =(4/5)3 = 0.8 3 =0.8⋅0.8⋅0.8= 0.512
將具有不同基數和指數的指數乘以分數:
(A / B)ñ ⋅(C / d)米
例:
(4/3)3 ⋅(1/2)2 = 2.37 / 0.25 = 9.481
用相同的分數指數除以分數指數:
a n / m / b n / m =(a / b)n / m
例:
3 3/2 / 2 3/2 =(3/2)3/2 = 1.5 3/2 = √(1.5 3)= √ 3.375 = 1.837
除以相同底數的分數指數:
a n / m / a k / j = a ( n / m)-(k / j)
例:
2 3/2 / 2 4/3 = 2 (3/2)-(4/3) = 2 (1/6) = 6 √ 2 = 1.122
用不同的指數和分數劃分分數指數:
a n / m / b k / j
例:
2 3/2 / 3 4/3 = √(2 3)/ 3 √(3 4)= 2.828 / 4.327 = 0.654
用分數相同的分數基除分數:
(a / b)n /(a / b)m =(a / b)nm
例:
(4/3)3 /(4/3)2 =(4/3)3-2 =(4/3)1 = 4/3 = 1.333
用相同指數的指數除以分數:
(a / b)n /(c / d)n =((a / b)/(c / d))n =(((a⋅d/b⋅c))n
例:
(4/3)3 /(3/5)3 =((4/3)/(3/5))3 =(((4⋅5)/(3⋅3))3 =(20/9)3 = 10.97
用具有不同基數和指數的指數劃分分數:
(a / b)n /(c / d)米
例:
(4/3)3 /(1/2)2 = 2.37 / 0.25 = 9.481
通過先提高每個指數,然後添加以下內容來添加分數指數:
a n / m + b k / j
例:
3 3/2 + 2 5/2 =√(3 3)+√(2 5)=√(27)+√(32)= 5.196 + 5.657 = 10.853
添加相同的底數b和指數n / m:
b n / m + b n / m = 2 b n / m
例:
4 2/3 + 4 2/3 =2⋅4 2/3 = 2⋅ 3 √(4 2)= 5.04
減去分數指數的方法是先提高每個指數,然後減去:
a n / m - b k / j
例:
3 3/2 - 2 5/2 =√(3 3) - √(2 5)=√(27) - √(32)= 5.196 - 5.657 = -0.488
減去相同的底數b和指數n / m:
3 b n / m - b n / m = 2 b n / m
例:
3⋅4 2/3 - 4 2/3 =2⋅4 2/3 = 2⋅ 3 √(4 2)= 5.04