( 3 a ^ - 2 )^ - 3
唔該...
可唔可以詳細d
因為我係用黎做功課!!!!‵‵
唔該曬
f.3 math問數
2007-09-08 12:07 am
回答 (3)
2007-09-08 12:21 am
✔ 最佳答案
這一條，要先解決括號的次方，(3a^-2)^-3 = (3)^-3 * (a^-2)^-3
3的負3次係1/27
(a^-2)^-3 係a^-2*-3=a^6
1/27 * a^6 = a^6 / 27
點解尼，
first
你要知道如何計次方，如a^2 * a^2 = a^2+2=a^4
a^ -2 = 1/a^2
(a^2)^2 = a^2*2=a^4....
a前邊有數都要乘次方…
2007-09-08 12:12 am
( 3 a ^ - 2 )^ - 3
= 3^(-3) × a^(-2 × -3)
= 1/3³ × a^6
= (a^6)/27
= 3^(-3) × a^(-2 × -3)
= 1/3³ × a^6
= (a^6)/27
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070907000051KK01555