... + +. M2a b = - < /b> 2 < /b> 2 2 < /b> 25 2< /b> 3 5 2 < /b> 3 55 b c b c b c b c + ị = + = + +0 ,25< /b> ( ) 2< /b> 2 2< /b> 4 4 0 2 < /b> 0 2b bc c b c c b - < /b> + = - < /b> = = 0 ,25< /b> 8a(1,0 im)Chn 2< /b> 1 2< /b> a b c = ỡ = - < /b> ị ớ = - < /b> ợ. Tac ... IltrungimcaBC.+ ( ) 2 < /b> 1C d C t t ẻ ị + I ltrungim ca ( )1 2 < /b> 3BC B t t ị - < /b> - 0 ,25< /b> ( ) ( ) ( ) ( ) ( ) ( ) 2 < /b> 2 1 2 < /b> 2 2< /b> 2. 0 2 < /b> 2 . 2 < /b> 2 1 . 2 < /b> 0 2< /b> 5AB t t AC t ttAB AC AB AC t t t tt = - < /b> - - < /b> ... 1 2.< /b> 16 2.< /b> 4 1log 4 2 < /b> 1 log 2.< /b> 16 2.< /b> 4 1 2.< /b> 16 2.< /b> 4 1 4 2 < /b> 1log 4 2 < /b> 1 4 2 < /b> 1 log 2.< /b> 16 2.< /b> 4 1 2.< /b> 16 2.< /b> 4 1 2< /b> x xx x xx xx x x x x x x xx x x x x x x x - < /b> + = - < /b> + - < /b> + - < /b> + - < /b> - + = - < /b> + - < /b> - + - < /b> +...