Quay lại đáp án

	2	sửa đáp án
x=0 thi y=1Voi x#0 thi y=1- $\frac{2x}{x^{2}+x+1}$ =1- $\frac{2}{x+1+\frac{1}{x}}$ Nhan thay:A=x $+\frac{1}{x}$ $\geq$ 2(Voi x>0)(Co-si 2 so)(x<0 thi A&t; )Vay GTNN cua y la $\frac{1}{3}$ $\Leftrightarrow$ x=1 x=0 thi y=1Voi x#0 thi y=1- $\frac{2x}{x^{2}+x+1}$ =1- $\frac{2}{x+1+\frac{1}{x}}$ Nhan thay:A=x $+\frac{1}{x}$ $\geq$ 2(Voi x>0)(Co-si 2 so)(x<0 thi A&t; )Vay GTNN cua y la $\frac{1}{3}$ $\Leftrightarrow$ x=1 x=0 thi y=1Voi x#0 thi y=1- $\frac{2x}{x^{2}+x+1}$ =1- $\frac{2}{x+1+\frac{1}{x}}$ Nhan thay:A=x $+\frac{1}{x}$ $\geq$ 2(Voi x>0)(Co-si 2 so)(x<0 thi A&t; )Vay GTNN cua y la $\frac{1}{3}$ $\Leftrightarrow$ x=1

	1	tạo mới
x=0 thi y=1Voi x#0 thi y=1- $\frac{2x}{x^{2}+x+1}$ =1- $\frac{2}{x+1+\frac{1}{x}}$ Nhan thay:A=x $+\frac{1}{x}$ $\geq$ 2(Voi x>0)(Co-si 2 so)(x<0 thi A<0 )Vay GTNN cua y la $\frac{1}{3}$ $\Leftrightarrow$ x=1

Chat chit và chém gió

hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:50 PM
hoahoa.nhynhay: . 11/5/2018 1:39:50 PM
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