Ta có |x-1| >=0
=> -2|x-1| =< 0
=> -2|x-1| - 7 =< 0 - 7
=> P =< -7
Dấu "=" xảy ra <=> |x-1| = 0
=> x-1 = 0
x = 0 + 1
x = 1
Vậy Pmax = -7 tại x = 1
TIM GIA TRI LON NHAT CUA BIEU THUC :
C=2+12/3x/X+5/+4
TIM GIA TRI NHO NHAT CUA BIEU THUC
C= -15/ 4x / 3X+7/+3
cho bieu thuc A = 2006 -x / 6-x tim gia tri nguyen cua x de A dat gia tri lon nhat. Tim gia tri lon nhat do
cho bieu thuc A = 2012 / 9 - x . Voi gia tri nguyen cua x thi A co gia tri lon nhat ? Tim tri lon nhat do .
tim gia tri lon nhat cua bieu thuc : -x2 + 2
tim gia tri lon nhat cua bieu thuc A=|X-1006|-|X+1014|
tim gia tri nho nhat hoac lon nhat cua bieu thuc sau:
x^2+15/x^2+3
tim gia tri lon nhat cua bieu thuc B=x^2+y^2+3/x^2+y^2+2
tim gia tri nguyen cua x de cac bieu thuc sau co gia tri lon nhat
a) A=1/7−X
b) B = 27-2x/12-x
tim gia tri lon nhat cua bieu thuc Q=19,5-|1,5-x|.Vây x se bang bao nhieu