已知m＞0,n＞0,且满足m+n=4,则下列不等式恒成立的是A.1/m+1/n≤1B.1/MN≥1/2C.1/(m^2+n^2)≤1/8

Question

已知m＞0,n＞0,且满足m+n=4,则下列不等式恒成立的是
A.1/m+1/n≤1 B.1/MN≥1/2 C.1/(m^2+n^2)≤1/8

Answer 1

C