Q6:
If x and k are integers and (12^X)(4^2X+1) = (2^K)(3^2), what is the value of k?
A. 5
B. 7
C. 10
D. 12
E. 14
Answer:请教为什么选E.?谢谢!!
原题有误
感觉如果为(12^x)(4^(2x+1))=2^(6x+2)*3^x=2^K*3^2
x=2
6x+2=k
所以k=14
小学数学~~~~还不算奥林匹克~~
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