81的N次方乘8的2N+1次方除以12的3N次方除以3的N次方,怎么解
问题描述:
81的N次方乘8的2N+1次方除以12的3N次方除以3的N次方,怎么解
答
81^N*8^(2N+1)/(12^(3N)*3^N)
=3^(4N)*2^(6N+3)/[3^(3N)*2^(6N)*3^N]
=3^[4N-3N-N]*2^[(6N+3)-6N]
=3^0*2^3
=1*8
=8