已知ax+ x/(x-1)>b,a,b为正实数,x>1证明√a +1>√b
问题描述:
已知ax+ x/(x-1)>b,a,b为正实数,x>1证明√a +1>√b
答
ax+1/(x-1)>b-1
a(x-1)+1/(x-1)>b-a-1
a(x-1)+1/(x-1)>=2√a>b-a-1
b