a) \(-x^2+6x+1=-\left(x^2-6x+9\right)+10=-\left(x-3\right)^2+10\le10\)
Vậy Max = 10 <=> x = 3
b) \(-5x^2-4x+1=-5\left(x^2+2.x.\frac{2}{5}+\frac{4}{25}\right)+\frac{4}{5}+1=-5\left(x+\frac{2}{5}\right)^2+\frac{9}{5}\le\frac{9}{5}\)
Vậy Max = \(\frac{9}{5}\Leftrightarrow x=-\frac{2}{5}\)
tim gia tri lon nhat ( hoac nho nhat ) cua cac bieu thuc sau:
a) A = x^2 - 6x + 11
b) B = 2x^2 + 10x - 1
c) C = 5x - x^2
giai jup mik voi
tim GTLN hoac GTNN cua bieu thuc C= -x2+6x+1
Tim gia tri nho nhat cua cac bieu thuc sau:
B=2x2+10x-1
C=5x-x2
1.gia tri x thoa man x+(3x+1)2+1=9(x2+1)
2. rut gon bieu thucA=(a+b+c)2-(a-b-c)2-4b(a+c)+88
3.GTNN cua bieu thuc 4x2-4x-999+4x(1+x3)
4 cho hinh thang ABCDcoAB // CD , goc DAC=90 do , co duong cao AH , goc DAH =15 do . so do goc ACD la...
Cho x,y,z la cac so nguyen duong thoa man 1/x + 1/y + 1/z = 2015.
Tim GTLN cua bieu thuc P=x+y/x^2+y^2 + y+z/y^2+z^2 + z+x/z^2+x^2
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 GTLN cua
a, A=4x-x^2+3
b,B=-x^2+6x-11
Tim Gia tri nho nhat cua ca bieu thuc sau
D=x^2+x+1
E=2x^2-6x
F=3x^2+4x+5
tim GTLN hoac GTNN cua bthuc
a) A=x2-6x+11
B=2x2+10x-1
c) 5x-x2
