Question

Cho mik xin mấy bài toán cosi vs ạ

Answer 1

bai 1

cho x>0, y>0 thoa man x+y\(\le\)1

cmr \(\frac{1}{x}\)+\(\frac{1}{y}\)\(\ge\)\(\frac{4}{x+y}\)

bai 2

tim a

m=\(\frac{a^{2^{ }}+a+1}{a}\): *(a+1)+\(\frac{1}{a}\)

mk chi co 2 bai thoi

chuc bn hoc tot