N
nguyendoankhue


giup mih nhe???
cau 1:cho a,b>0 CMR: (a^n + b^n)/2\geq [(a+b)/2]^n
roi!!!!the da??!! mih lam may cau kia ko lam dc thi nho tip
cau 1:cho a,b>0 CMR: (a^n + b^n)/2\geq [(a+b)/2]^n
roi!!!!the da??!! mih lam may cau kia ko lam dc thi nho tip