Sửa đề: Tìm GTNN của \(C=x^2-3x+2017\)
Ta có:
\(C=x^2-3x+2017\)
\(C=\left(x^2-3x+\frac{9}{4}\right)+\frac{3}{4}+2014\)
\(C=\left(x-\frac{3}{2}\right)^2+2014\frac{3}{4}\ge2014\frac{3}{4}\left(\forall x\right)\)
Dấu "=" xảy ra khi: \(\left(x-\frac{3}{2}\right)^2=0\Rightarrow x=\frac{3}{2}\)
Vậy \(Min_C=2014\frac{3}{4}\Leftrightarrow x=\frac{3}{2}\)
tim GTLN hoac GTNN cua bieu thuc D= -3x2 +12x+11
tim GTLN hoac GTNN cua bieu thuc C= -x2+6x+1
tim gtnn cua bieu thuc a=(x-1)(2x-1)(2x^2-3x-1)+2017
mọi ng giúp mk vs mai mk phải nộp rồi
1/Tim GTLN cua bieu thuc \(M=\frac{4x^2}{x^4+1}\)
2/ Biet x+y =2. GTNN cua bieu thuc A=3x2+y2 là?
ban nao giai cho minh thi minh xin tang ban do 20 like.
tim gia tri cua x de bieu thuc co GTNN
a) 3x^2 - 6x - 1
b) ( x - 1)( x + 2 )( x + 3 )( x + 6 )
tim GTNN cua cac bieu thuc
a)2x\(^2\)+8x+1
b)2x\(^2\)+3x+1
Tim GTNN cua cac bieu thuc sau
A = x2 + 3x + 7
B = ( x - 2 ) . ( x - 5 ) . ( x2 - 7x - 10 )
tim gtnn cua bieu thuc
C=5x2+y2+10+4xy-14x-6y
Tim gtnn cua bieu thuc A=(2x^2+4x-1)/(x^2+1)
