(x+1)x+2=(x+1)x+4
=> (x + 1)x+2 = (x+1)x+2 . (x+1)2
=> (x + 1)2 = 1
=> \(\hept{\begin{cases}x+1=1\\x+1=-1\end{cases}\Rightarrow\hept{\begin{cases}x=0\\x=-2\end{cases}}}\)
B1:tìm x biết a, (-2+x^2)(x^2-2)(x^2-2)(x^2-2)(x^2-2)=1 b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4) c,(8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1) d, 2x^2+3(x-1)(x+1)=5x(x+1) e, (8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x) f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
Bài 1:
a, (-2+x\(^2\))(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)=1
b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)
c, (8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1)
d,2x\(^2\)+3(x-1)(x+1)=5x(x+1)
e,(8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x)
f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
Tìm giá trị nhỏ nhất của biểu thức:
4/ Q = |x + 1/5| - x + 4/7
5/ D = |x| + |8 - x|
6/ L = |x - 2012| + |2011 - x|
7/ E = |x - 2006/2007| + |x - 1|
8/ F = |x - 1/4| + |x - 3/4|
9/ M = |x - 1| + |x - 2| + |x - 3|
10/ G = |x + 3| + |x - 2| + |x - 5|
11/ P = |x + 1/2| + |x + 1/3| + |x + 1/4|
12/ N = |x - 1| + |x - 2| + |x - 3| + |x - 4|
13/ H = |x - 2| + |x - 3| + |x - 4| + |x - 5|
14/ I = |x + 5| + |x + 2| + |x - 7| + |x - 8|
15/ K = |x - 1| + |x - 2| + |x - 3| + ... + |x - 1996|
Bài 1 : tìm x biết
a) ( /x/ - 1/4 ) . ( x2 - 9 ) = 0
b) ( /x/ + 2 ) . ( /x/ - 4 ) = 0
c) ( x2 - 1/4 ) . ( x2 - 1/10 ) = 0
d) ( x + 2 ) . ( x - 3 ) < 0
e) ( x - 1/4 ) . ( x + 1/2 ) > 0
Bài 1 : Tìm x biết
a) ( /x/ - 1/4 ) . ( x2 - 9 ) = 0
b) ( /x/ + 2 ) . ( /x/ - 4 ) = 0
c) ( x2 - 1/4 ) . ( x2 - 1/16 ) = 0
d) ( x + 2 ) . ( x - 3 ) < 0
e) ( x - 1/4 ) . ( x + 1/2 ) > 0
Tìm x trong tỉ lệ thức :
a) x+2/5=1/x-2 (x khác 2 )
b) 3/x-4=x+4/3 (x khác 4 )
c) x+2/2=1/1-x (x khác 1 )
TÌM X, BIẾT:
a) 3 . ( 1/2 - x ) + 1/3 = 7/6 - x
b) 4 . ( 1/2 - x ) - 5 . ( x - 3/10 ) = 7/4
c) -3/2 . ( 4/5 - 2/3 ) + x = 4 . ( x - 1/2 )
d) 2 . ( 3/2 - x ) - 1/3 = 7x - 1/4
e) 1/5 . ( -3/5 -10 ) + 5x = x - 2/3
f) -3/2 . ( 5 - 1/6 ) + 4 . ( x - 1/2 ) = 1
~ PLEASE HELP ME ~
Tìm x, biết
a)\(\dfrac{1}{2}\)x\(x\)-\(\dfrac{7}{3}\)=\(\dfrac{-5}{6}\)+\(\dfrac{3}{4}\)x\(x\)
b)\(\dfrac{4}{5}\)x\(x\)-\(\dfrac{6}{5}\)=\(\dfrac{1}{2}\)+\(\dfrac{3}{2}\)x\(x\)
c)\(\dfrac{2}{5}\)x(3x\(x\)+\(\dfrac{3}{4}\))=\(1\dfrac{1}{5}\)-\(\dfrac{1}{3}\)x\(x\)
d)2x(3x\(x \)+\(\dfrac{3}{4}\))+\(\dfrac{4}{5}\)=\(\dfrac{1}{2}\)-2x\(x\)
tìm x biết
a).|x|-3/4=4/5
b).|x+1/3|-1/2=1/4
c).3.|2.x-3|+4=9/2
d).|2.x-5|=x-1
e).|3-4.x|=2-x
