Ta có: |x - 2016| = |2016 - x| ≥ 2016 - x
=> A ≥ 2016 - x + x - 1 = 2015
Dấu "=" xảy ra <=> 2016 - x ≥ 0
<=> x ≤ 2016
Ta có: |x - 2016| = |2016 - x| ≥ 2016 - x
=> A ≥ 2016 - x + x - 1 = 2015
Dấu "=" xảy ra <=> 2016 - x ≥ 0
<=> x ≤ 2016
tim x de bieu thuc sau dat gia tri lon nhat . Hay tim gia tri lon nhat do A=\(\dfrac{2026}{x-2013+2}\)
sap sep cac so thuc: -3,2; 1; -1/2; 7,4; 0; -1,5
a) theo thu tu tu nho den lon
b) theo thu tu tu nho den lon cua cac gia tri tuyet doi cua chung
tim x ,biet
a)3,2.x+(-1,2).x+2,7=-4,9
b)-5,6.x+2,9.x-3,86=-9,8
bieu dien cac so do tren truc so neu nhan xet ve vi tri cua 2 so do doi voi nhau doi voi 0
Tim GTNN,GTLN cua F=1/2(x-1)^2+3
Bai 1: so sanh 31^11 va 17^14
Bai2: So hoc sinh khoi 6,7,8,9 cua mot truong THCS ti le vs cac so 9;8;8;6. Biet rang tong so hoc sinh khoi 8 va khoi 9 it hon tong so hoc sinh khoi 6 va khoi 7 la 120 hoc sinh. Tinh so hoc sinh moi khoi?
Bai3: bai toan ap dung tinh chat cua day ti so bang nhau :
Tim dien tich cua mot hinh chu nhat biet i so giua chieu dai va chieu rong cua hinh chu nhat do la 3/2 va chu vi hinh chu nhat la 20 met.
Giup mk vs mai mk nop r! Can gap!
Cho các số a,b,c,d khác 0. Tính \(T=x^{2017}+y^{2017}+z^{2017}+t^{2017}\)
Biết x,y,z,t thỏa mãn: \(\dfrac{x^{2016}+y^{2016}+z^{2016}+t^{2016}}{a^2+b^2+c^2+d^2}=\dfrac{x^{2016}}{a^2}+\dfrac{y^{2016}}{b^2}+\dfrac{z^{2016}}{c^2}+\dfrac{t^{2016}}{d^2}\)
Câu 1 : Tìm GTLN
a) \(A=\dfrac{2003}{\left(x-2\right)^2+\left(x-y\right)^6+3}\)
b) \(B=3-\left(2x+\dfrac{1}{3}\right)^6\)
c) \(C=\dfrac{x^{2016}+2017}{x^{2016}+2015}\)
Bài 1: Cho A= x^3 + x^2.y -2.x^2 -x.y -y^2 +3.y +x +2016
Tính A biết x+y-2=0
a)A=/x+7/+/x^2-169/-/x-2018/
b)B=[2018/2+2018/3+2028/4+.....+2019/2018]:[1/2018+2/2017+3/2016+......+2018]