5x-x2=-(x2-5x+25/4)+25/4=-(x-5/2)2+25/4
=>max 5x-x2=25/4<=>x=5/2
5x-x2=-(x2-5x+25/4)+25/4=-(x-5/2)2+25/4
=>max 5x-x2=25/4<=>x=5/2
Tim gia tri lon nhat cua P= -5x^2 - 4x + 1
tim gia tri lon nhat
5x2-x2
A=-3x^2-5x+1/2
B=-4x^2-3x+1/3
C=-2x^2+3x-1
tim gia tri lon nhat
giup to 2 bai nay
1. gia tri x lon nhat thoa man x2(5x-2)+6=15x
2. gia tri x>0 de -3x4+12x2+1 dat gia tri lon nhat
giup to 2 bai nay
1. gia tri x lon nhat thoa man x2(5x-2)+6=15x
2. gia tri x>0 de -3x4+12x2+1 dat gia tri lon nhat
giup to 2 bai nay
1. gia tri x lon nhat thoa man x2(5x-2)+6=15x
2. gia tri x>0 de -3x4+12x2+1 dat gia tri lon nhat
cho 2x+y=6 tim gia tri lon nhat K=xy
tim gia tri lon nhat cua M= -3x^2-6x+9
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