我想知道呢條數係點？！
Multiple Choice Question 多項選擇題
Given yhat A is a non-zero constant, M and N are integers, which of the following must be correct ?
已知A是非零常數，且M和N是整數，下列哪項必定正確？
Ⅰ.A^M÷A^N=A^M-N
Ⅱ.(A^M)^N=A^M+N
Ⅲ.(A+B)^M=A^M+B^M
Ⅳ.(1」A)^M=A^ -M
A.Ⅰ and Ⅲ only 只有Ⅰ和Ⅱ
B.Ⅰand Ⅳ only 只有Ⅰ和Ⅳ
C.Ⅱ and Ⅳ only 只有Ⅱ知Ⅲ
D.Ⅰ,Ⅲ and Ⅳ only 只有Ⅰ.Ⅲ and Ⅳ
請答詳細小小
INDICES (指數) 一問
2008-11-27 7:45 pm
回答 (2)
2008-11-27 9:26 pm
✔ 最佳答案
Answer is B.For (II), (A^M)^N = (A^M)(A^M)(A^M)...... for N times
= A^(Mx N) = A^(MN), not A^M +N.
For (III). (A + B)^M = (A+B)(A+B)(A+B).... for M times, so not equal to A^M +B^M. For example, (A+B)^2 = A^2 + B^2 + 2AB, not A^2 +B^2.
2008-12-02 6:06 am
B .
收錄日期: 2021-04-25 22:36:33
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