y=log2 x/(x-1 )的反函数

问题描述:

y=log2 x/(x-1 )的反函数
还有 若lgx1、lgx、lgx3、lgx4、lgx5是由大到小的连续正整数,且(lgx4)^2小于lgx1·lgx5 则x1的最小值是(数字是下标)~

y=log2 x/(x-1 )x/(x-1 )=2^yx=(x-1)*2^yx=(2^y)/(2^y-1)定义域为|y|>0由已知条件:x1=10 * x2 = 100 * x3 = 1000 * x4 = 10000 * x5(lgx4)^2