\(x\ge2\) \(\Rightarrow\) \(x-2\ge0\)
\(\Rightarrow\)\(\left|x-2\right|=x-2\)
Ta có: \(3\left|x-2\right|+2x=19\)
\(\Leftrightarrow\)\(3\left(x-2\right)+2x=19\)
\(\Leftrightarrow\)\(3x-6+2x=19\)
\(\Leftrightarrow\)\(5x=25\)
\(\Leftrightarrow\)\(x=5\)
Vậy...
Tim x biet:
A. (x-3/4).(3x+1/2)lon hon hoac bang 0
B. (2x+1).(4x+3)be hon hoac bang 0
Tim x: a) (x-3)=2x+5 voi x lon hon hoac bang 3
Cho | x | lon hon hoac bang 3 ; | y | = 5 , x; y thuoc tap hop Z . tim x ; y
Tap hop A x thuoc N 2 lon hon hoac bang va be hon hoac bang 78.
Tim so nguyen x, biet:
( x -5) .(x -10) lon hon hoac bang 0
Tim x thuoc z
12 lon hon hoac bang /x/ <15
hay viet cac tap hop sau bang cach khac
A={ 9;11;13;...;99]
B={ 12 ; 24 ; 36 ;48}
M= { THANG 4 ; THANG 6 ;THANG 9 ; THANG 11}
N = { X THUOC N / X LON HON HOAC BANG 3 , LON HON HOAC BANG 10}
Q = { X THUOC N / X LON HON 0 ,BE HON 10}
Tim x € n thoa man
A)6 chia het cho (x-1)
B)14 chia het cho (2×X+3)
C)X+1 la uoc (15
D)X chia het cho 13 va 10 be hon hoac bang X be hon hoac bang 70
E)X € B(15)va 20 be hon hoac bang X be hon hoac bang 80
F ) X € uoc (42); X lon hon 5
G)35 chia het cho X va X be hon 10
Mik kO biet viet ki hieu 😀😀😀 thong cam nha
Ai dug thi thong minh 🎓🎓🎓
mik se kban va tick 🐇🐇
tim so tu nhien n biet rang:
411.2511 lon hon hoac bang 2n.5n lon hon hoac bang 2012.512
