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\(S_{ABCD}=S_{AED}+S_{EBCD}=S_{AED}+5S_{AED}=6S_{AED}\)
\(=6.\dfrac{AE.AD}{2}=3.AE.AD\) but \(S_{ABCD}=AB.AD\)
\(\Rightarrow AB=3AE\Rightarrow EB=AB-AE=3AE-AE=2AE\)
Hence, the answer is 1 : 2
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There are 4 cases :
+ \(x< -2\)
\(-x-2=1-3x\Leftrightarrow2x=3\Leftrightarrow x=\dfrac{3}{2}\) (asburd)
+ \(-2\le x< \dfrac{1}{3}\)
\(x+2=1-3x\Leftrightarrow4x=-1\Leftrightarrow x=-\dfrac{1}{4}\) (satisfied)
+ \(x\ge\dfrac{1}{3}\)
\(x+2=3x-1\Leftrightarrow3=2x\Leftrightarrow x=\dfrac{3}{2}\) (satisfied)
So, \(S=\left\{-\dfrac{1}{4};\dfrac{3}{2}\right\}\)
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Monster girls 29/11/2017 at 15:41\(0,0A=\sqrt{0.0049}=0.07\)
\(\Rightarrow A=7\)
Selected by MathYouLike -
Trần Quỳnh Anh 27/12/2017 at 19:52we have : 0,0A=\(\sqrt{0,0049}\)
but \(\sqrt{0,0049}=0,07\)
\(\Rightarrow0,0A=0,07\)
\(\Rightarrow A=7\)
So the value of A is 7
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Help you solve math 31/12/2017 at 08:16We have :
A = 545 - 544 = 544(54 - 1)
= 544 . 53
=> A : 53
longia selected this answer. -
Do not A4 and self-, Help you solve math.
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longia 31/12/2017 at 08:27Đề sai xin lỗi
such that the function 
has a domain of all real numbers?-
Cristiano Ronaldo 03/08/2018 at 14:23
Everyone has one at the time, down, but it never moves or moves anywhere
Answer: It's a road
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Trịnh Đức Phát 22/03/2017 at 12:39
We have : A = 1.2 + 2.3 + 3.4 + ...... + 100.101
=> 3A = 1.2.3 - 1.2.3 + 2.3.4 - 2.3.4 + ....... + 99.100.101
=> 3A = 99.100.101
=> A = 99.100.101/3
=> A = 333300
Nếu Có Thể selected this answer. -
→இے๖ۣۜQuỳnh 22/03/2017 at 20:15B = 1 + 2 + 3 + ...... + 100
B is numbered as:
100 - 1 + 1 = 100 (số)
Total B is:
(100 x 101) : 2 = 5050
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→இے๖ۣۜQuỳnh 22/03/2017 at 20:14
C = 12 + 22 + 32 + ...... + 1002
= 1.1 + 2.2 + 3.3 + ...... + 100.100
= 1.(2 - 1) + 2.(3 - 1) + 3.(4 - 1) + ...... + 100.(101 - 1)
= 1.2 - 1 + 2.3 - 2 + 3.4 - 3 + ....... + 100.101 - 100
= (1.2 + 2.3 + 3.4 + ...... + 100.101) - (1 + 2 + 3 + ...... + 100)
From the calculated results of A and B we should compute
C = 333300 - 5050
C = 328250
