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17 tháng 4 2022
\(\left|2x-3\right|=3-2x\)
\(ĐK:x\le\dfrac{3}{2}\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-3=3-2x\\3-2x=3-2x\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\0=0\left(đúng\right)\end{matrix}\right.\)
Vậy \(S=\left\{x\in R;x=\dfrac{3}{2}\right\}\)
20 tháng 6 2023
a:
C1: =3/4*2*1/2=3/2*1/2=3/4
C2: =1/2*2*3/4=1*3/4=3/4
b:
C1: =5/4*5/7=25/28
C2: =3/4*5/7+1/2*5/7=15/28+5/14=25/28
c:
C1: =13/21(5/7+2/7)=13/21
C2: =65/147+26/147=91/147=13/21
TM
0
3 tháng 9 2021
b: Xét ΔABE vuông tại A có AH là đường cao ứng với cạnh huyền BE
nên \(BH\cdot BE=AB^2\left(1\right)\)
Xét ΔABC vuông tại B có BH là đường cao ứng với cạnh huyền AC
nên \(AH\cdot AC=AB^2\left(2\right)\)
Từ (1) và (2) suy ra \(BH\cdot BE=AH\cdot AC\)
DT
Đỗ Thanh Hải
CTVVIP
4 tháng 6 2021
1 It was such a difficult climb that we stopped to rest several times
2 She didn't ran fast enough to win the race
3 It was such a heavy bag that I had to ask for help
4 The house is too small for us to live in
5 Jack's suit was so elegant that everyone complimented him
6 My sister is not old enough to watch horror films
7 My mother is such a wise person that people often aske her for advice
8 The package is not light enough for you to lift by yourself
9 This book is too old for the children to eat
10 It was such an interesting book that I couldn't put it down
11 It is such a weak bird that it can't fly
12 These boyss aren't old enough to watch that film
13 They are such small sandals that they don't fit me
1 them
2 make
3 with
4 give
5 for
6 cook
7 table
8 wash
9 very
10 mother