Quay lại đáp án

	4	đánh cũng sai :))
$a^2b+ab^2-2abc+b^2c+bc^2-2abc+a^2c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$ $a^b+ab^2-2abc+b^c+bc^2-2abc+a^2c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$ $a^2b+ab^2-2abc+b^2c+bc^2-2abc+a^2c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$

	3	thêm 1 ký tự trong đáp án
$a^b+ab^2-2abc+b^c+bc^2-2abc+a^2c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$ $a^b+ab^2-2abc+b^c+bc^2-2abc+a^c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$ $a^b+ab^2-2abc+b^c+bc^2-2abc+a^2c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$

	2	bớt 26 ký tự trong đáp án
$a^b+ab^2-2abc+b^c+bc^2-2abc+a^c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$ a^2b+ab^2-2abc++b^2c+bc^2 -2abc+c^2a+ca^2-2abc =a^2b+bc^2-2abc+ab^2+ac^2 -2abc+b^2c+ca^2-2abc =b(a^2+c^2-2ac)+a(b^2+c^2-2bc) +c(a^2+b^2-2ab) =b(a-c)^2+a(b-c)^2+c(a-b)^2 >0 $a^b+ab^2-2abc+b^c+bc^2-2abc+a^c+ac^2-2abc$$\Leftrightarrow a^2b+b^2c-2abc+ab^2+ac^2-2abc+b^2c+ca^2-2abc$$<=>b(a-c)^2+a(b-c)^2+c(a-b)^2\geq 0$

	1	tạo mới
a^2b+ab^2-2abc++b^2c+bc^2 -2abc+c^2a+ca^2-2abc =a^2b+bc^2-2abc+ab^2+ac^2 -2abc+b^2c+ca^2-2abc =b(a^2+c^2-2ac)+a(b^2+c^2-2bc) +c(a^2+b^2-2ab) =b(a-c)^2+a(b-c)^2+c(a-b)^2 >0

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
hoahoa.nhynhay: ..................... 11/5/2018 1:39:52 PM
vinhlyle: hi 11/10/2018 8:03:02 PM
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quanghungnguyen256: sao wweb cứ đăng nhập mãi nhĩ, k trả lời đc bài viết nữa 11/30/2018 4:35:45 PM
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quanghungnguyen256: 11/11/2018 h là 30/11. oi web chắt k ai dùng r hả 11/30/2018 4:36:44 PM
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Việt EL: ^^ 2/16/2019 8:37:21 PM
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