\(8x-2x^2+5=-2\left(x^2-4x-\frac{5}{2}\right)=2\left(x-2\right)^2+13\)
\(2\left(x-2\right)^2+13\ge13\)
Nhưng sao lại là tìm Max??!!
\(8x-2x^2+5=-2\left(x^2-4x-\frac{5}{2}\right)=2\left(x-2\right)^2+13\)
\(2\left(x-2\right)^2+13\ge13\)
Nhưng sao lại là tìm Max??!!
gia tri lon nhat cua bieu thuc: A= -2x2 + x - 5
Tim gia tri lon nhat cua bieu thuc p=-x^2+13x+2012
1. cho x+y=7 va xy=8 gia tri cua bieu thuc x3+y3 = ?
2. gia tri lon nhat cua bieu thuc B= 1+3x-x2 la ?
1. cho x+y=7 va xy=8 gia tri cua bieu thuc x3+y3 = ?
2. gia tri lon nhat cua bieu thuc B= 1+3x-x2 la ?
tim gia' tri. lon' nhat' cua? bieu thuc
F=-x^2-4x+20
tim gia tri lon nhat cua bieu thuc A=3-4x/x2+1
TINH GIA TRI LON NHAT CUA BIEU THUC
B=9x-3x2
1.gia tri lon nhat cua bieu thuc 7x-2x2
2.gia tri x>1 thoa man (9x-7)2=(5-2x)2
3.gia tri nho nhat cua x4+x2-5.42
tim gia tri lon nhat cua bieu thuc sau:
C=2/x2-6x+15