Cho a,b,c,d là các số thực dương và abcd=1. Tìm Max P=$\frac{1}{3+a}+\frac{1}{3+b}+\frac{1}{3+c}+\frac{1}{3+d}$
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There have been 130 items by quoctruong1202 (Search limited from 09-06-2020)
There have been 130 items by quoctruong1202 (Search limited from 09-06-2020)