推 nicewine1 :能不能先提供一下你的證法作為參考 09/19 19:08
推 j0958322080 :之前好像有看過這題 09/19 19:13
推 dorminia :排序不等式, done 09/19 19:15
→ nicewine1 :sin(1/x)= 0 as x is large 09/19 19:18
→ nicewine1 :sin(1/x)->0 as x is large 09/19 19:19
推 k6416337 :用f(x)=x^n跟凸性證更快 而且n可以推廣到≧1的實數 09/19 21:08