|x+1|+|x+2|+|x+3|+|x+4|=4x
<=>x+1+x+2+x+3+x+4=4x
<=>4.x+1+2+3+4=4.x
<=>4.x+10=4x
<=>4x=4x-10
=>x∈Φ
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tìm x biết
1) |x+1|+|x-2|+|x+3|=6
2) |1-x|+3|x-3|-2|x-2|=x
3) |x+1|+|x+2|+|x+3|=4x
4) |x+1|+|x+2|+|x+3|+|x+4|=5x+1
5)||2x-3|-x+1|=4x-1
QA
16 tháng 10 2021 lúc 23:26
Tìm x,y,z biết : |x + 11/7|+|x + 2/17|+|x + 4/17|=4x
5) (x– 5)(x – 1) (x – 1)(x – 2)6) 6(х - 3)(х — 4) - 6х(х — 2) 47)-(x + 3)(x – 4) + (x + 1)(x – 1) 108) (2x – 1)(x – 2) – (x + 3)(2x – 7) 39) (х - 5)(4 — х) — (х — 1)(х + 3) -2x^210 (4x + 1)(x – 3) - (x- 7)(4x – 1)1511) (x + 1)(x² – x + 1) – x(x² – 3) 412) (x – 3)(x² + 3x+9)+ x(5 – x²?) 6x13) (3x – 5)(x + 1)– (3x – 1)(x+ 1)x - 414) 5(x – 3)(x – 7)– (5x+ 1)(x – 2) 8
Đọc tiếp
5) (x– 5)(x – 1)= (x – 1)(x – 2)
6) 6(х - 3)(х — 4) - 6х(х — 2) = 4
7)-(x + 3)(x – 4) + (x + 1)(x – 1) = 10
8) (2x – 1)(x – 2) – (x + 3)(2x – 7) =3
9) (х - 5)(4 — х) — (х — 1)(х + 3) = -2x^2
10 (4x + 1)(x – 3) - (x- 7)(4x – 1)=15
11) (x + 1)(x² – x + 1) – x(x² – 3) = 4
12) (x – 3)(x² + 3x+9)+ x(5 – x²?) = 6x
13) (3x – 5)(x + 1)– (3x – 1)(x+ 1)=x - 4
14) 5(x – 3)(x – 7)– (5x+ 1)(x – 2)= 8
tìm x biết | 2- 5x| < 1
|1- 4x | >5
2\5 <|x-7\5 | <3\5
|x+1\1*3 | + | x+1\3*5| +....+|x+ 1\97*99| = 50x
TÌm GTNN:
1) 2x2 + 9y2 - 6xy - 6x - 12y + 2004.
2) x( x + 1)( x2 + x - 4).
3) ( x2 + 5x + 5)[( x + 2)( x + 3) + 1].
4) ( x - 1)(x - 3)( x2 - 4x + 5)
HELP ME !!!!!
Tìm x biết
a) 3(1-4x).(x-1)+4(3x-2).(x+3)=-27
b) (x+3).(x2-3+9)-.(x-1).(x+1)=27
c) 2x2+3(x-1).(x+1)=5x.(x+1)
d) 8(x-1).(x+5)-(x+2).(x+5)=3(x-1).(x+2)
Tìm nghiệm
D(x)=3x^3+x
E(x)=x^2-3x+2
F(x)=4x^2-4x+1
Tìm x,y,z biết:
4/3x-2y = 3/2z-4x = 2/4y-3z và x+y-z=-10
Tìm x, biết
2(4x-3)-3(x+5)+4(x-10)= 5(x+2)