Bài 1: Tìm x, biết:
a) \(\sqrt{1,69}.(2.\sqrt{x}+\sqrt{81/121})=13/10\)
b) \((2x^2-3).(3x^2-1/0,12).(x^2+1)=0\)
c) \(|2/5.\sqrt{x}-1/20|-3/4=1/5\)
d) \(x-5\sqrt{x}=0\)
e) \(2x^7=3x^9\)
f) \(x^6=4x^8\)
Giải hộ mik với nha! Thank you
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
Các bn ơi giúp mình với, ai trả lời nhanh và đúng mìh tick cho:
Bài 1: Tìm x biết:
1) ( 3x - 2 ) . ( 2x - 2/3) = 0
2) 2/3 + 1/3 : x = 3/5
3) x + 4/2000 + x + 3/2001 + x + 2/2002 + x + 1/2003
4) x + 4/2015 + x + 3/2016 + x + 2/2017 + x + 1 + 2018 + x + 2015/2
5) ( 5 - x ) . ( 3x - 1/4 ) > 0
6) ( x + 2/3 ) . ( 1/4 - x ) > 0
7) ( x - 1 ) . ( x - 2 ) / x - 3 > 0
8) x . ( x + y + Z ) = -3; y . ( x + y + Z ) = 4; Z . ( x + y + Z ) = 3
9) xy = 9Z; yZ = 4x; xZ = 16 . y
10) xy = 2/7; yZ = 3/2; Zx = 3/7
11) 5/x + y/4 = 1/8 với x . y thuộc Z
Bài 1: Tìm x; y ϵ \(ℤ\)
a) 2x - y\(\sqrt{6}\) = 5 + (x + 1)\(\sqrt{6}\)
b) 5x + y - (2x -1)\(\sqrt{7}\) = y\(\sqrt{7}\) + 2
Bài 2: So sánh M và N
M = \(\dfrac{\dfrac{3}{4}+\dfrac{3}{5}+\dfrac{3}{7}-\dfrac{3}{11}}{\dfrac{6}{4}+\dfrac{6}{5}+\dfrac{6}{7}-\dfrac{6}{11}}\)
N = \(\dfrac{\dfrac{2}{3}+\dfrac{2}{5}-\dfrac{2}{7}-\dfrac{2}{11}}{\dfrac{6}{2}+\dfrac{6}{5}-\dfrac{6}{7}-\dfrac{6}{11}}\)
Bài 3: Chứng minh:
\(\dfrac{1}{2!}+\dfrac{1}{3!}+\dfrac{1}{4!}+...+\dfrac{1}{2023!}< 1\)
Tìm x biết:
1, | 3x -5 |-1/7=1/3
2, (3/5x - 2/3x - x) .1/7=-5/21
3, 1/3x - 2=3/5
4, 0,2+|x-2,3| = 1,1
5, (5x-1).(2x+1/3) =0
6. 2/3: x +6 =4
7, 5.(x+2)3 + 7=2
8, 5|x+1| /2= 90/ |x+1|
9, 14- |3x/2 -1 |= 9
Giúp mk vs ạ
tìm x:
a) |4 - x| + 2x = 3
b) |x - 7| + 2x + 5 = 6
c) 3x - |2x + 1| = 2
d) |x + 2| - x = 2
e) |x - 3| = 21
f) |2x + 3| - |x - 3| = 0
g) |x + 1/8| + |x + 2/8| + |x + 5/8| = 4x
h) |x - 2| - |2x + 3| - x = -2
i) |2x - 3| - x = |2 - x|
k) 2. |x - 3| - |4x -1 = 0
Tìm x,tính nhanh:
a.\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7.\)
b.\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c.\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d.\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
\(x^2+5x+6=3x+3\cdot4+2x-9\)
\(2\sqrt{x}+8x+5=5x-4+3x+19\)
\(5\sqrt{x}+2x-8=5x+4-3x-19\)
\(2x^2+5z+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
\(2\sqrt{3x}+11x-18=5x+2+6\cdot\sqrt{3x}+6x-21\)
x2= 1
x2=3
x2=5 với x<0
x2=7 với x<0
x2=9
(x-2)2=2
(x-4)2=4
(x-6)2=6
(x-8)2=8
(x-10)2=10
(x-\(\sqrt{3}\) )2=3
(x-\(\sqrt{5}\))2=5