Bieu thuc B=2015+/+4/ dat gia tri nho nhat x la
bieu thuc B =2015+|x+4| dat gia tri nho nhat khi x=
bieu thuc B = 2015 + | x + 4 | dat gia tri nho nhat khi x =
bieu thuc A=2015+|x+3| dat gia tri nho nhat khi x=
gia tri cua b bieu thuc
C=/3b+7.2/+/a-2.1/
dat gia tri nho nhat la
tim x nguyen de cac bieu thuc sau dat gia tri nho nhat : x+5/x-4
Tim gia tri cua x de bieu thuc P=(x^2-2x+1989)/x^2 dat gia tri nho nhat.
\(P=\frac{x^2-2x+1989}{x^2}\)
\(\Leftrightarrow Px^2=x^2-2x+1989\)
\(\Leftrightarrow x^2\left(1-P\right)-2x+1989=0\)
\(\Delta=4-4\left(1-P\right)1989\ge0\)
\(\Leftrightarrow P\ge\frac{1988}{1989}\)có GTNN là \(\frac{1988}{1989}\)
Dấu "=" xảy ra \(\Leftrightarrow x=1989\)
Vậy \(P_{min}=\frac{1988}{1989}\) tại x = 1989
bieu thuc A=2(3x-1)^2+6(x+6)^2+4 dat gia tri nho nhat tai x=?
bieu thuc B= /4x-8/^6+(x-4)^24+9 dat gia tri nho nhat tai x =
ai nhanh ma dung mik tick cho
bieu thuc B= /4x-8/^6+(x-4)^24+9 dat gia tri nho nhat tai x =
ai nhanh ma dung mik tick cho