log2(x-2)=log4(5-x)

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/04/26 01:56:17

log2(x-2)=log4(5-x)

log4(5-x)=1/2log2(5-x)=log2(5-x)½=log2(x-2)
因为log2 x为单调函数,
所以(5-x)½=(x-2)解得x=(3±√13)/2
又因为x定义域为﹙2,5﹚,所以x=(3﹢√13)/2

log2(x-2)=log4(5-x) log4(log2^x)=log2(log4^x)求log2^x log2^x=log4^9 解方程：log2(3-x) - log4(x+5) =1 log4 (x+2) = log2 (2x-1) 解方程log2(2x)*log4(x/4)=2 解方程log4(2-x)=log2(x-1)-1 log4^(2-X)=log2^(X-1)-1 求解log2 (3X+2)-log4 (X)=3 log2^x >= log4^(3x+4) 对数问题 log2^x=log4^9 log2^x=log4^x,则x=