T
tranquanghung97


cho a,b,c\geq0 và a+b+c=3
CMR (a-1)^3 +(b-1)^3+ (c-1)^3\geq-3/4
giúp tớ nhá hhhhhhhhhhhhhhhhhhhhhhiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
CMR (a-1)^3 +(b-1)^3+ (c-1)^3\geq-3/4
giúp tớ nhá hhhhhhhhhhhhhhhhhhhhhhiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii