✔ 最佳答案
指數相乘時, 只需要將指數直接相加就 ok
eg. A^2 * A^3
= A^(2+3) = A^5
如果係除, 就將指數相減
eg. A^6 / A^3
= A^(6-3) = A^3
1)
(3b)(5b^4)
= 15b^(1+4)
= 15b^5
2)
樓上係個計法係錯架, 留意兩個括號入面既數係相乘而唔係相加
所以指數相乘時, 只需要將指數直接相加就 ok
(a^3 b^2) (a^3 b^4)
= a^(3+3) b^(3+3)
= a^6 b^6
3)
(35c6次方)/(7c)
= (35/7) c^(6-1)
= 5c^5
4)
(24 x^8 y^11)/(-3 x^4 y^3)
= (24/-3) x^(8-4) y^(11-3)
= -8 x^4 y^8
2007-07-26 14:04:14 補充:
sorry, 第二題打錯左, 應該係(a^3 b^2) (a^3 b^4)= a^(3 3) b^(2 4)= a^6 b^6