若abcd均为正实数,且a>b,那么b/a .a/b .(b+c)/(a+c).(a+d)/(b+d)比大小
问题描述:
若abcd均为正实数,且a>b,那么b/a .a/b .(b+c)/(a+c).(a+d)/(b+d)比大小
答
a/b > (a+d)/(b+d) > (b+c)/(a+c) > b/a
若abcd均为正实数,且a>b,那么b/a .a/b .(b+c)/(a+c).(a+d)/(b+d)比大小
a/b > (a+d)/(b+d) > (b+c)/(a+c) > b/a