`(x-1/4)^2(1/2 + 1/3 + 3/2 - 1/2) = 8`
`(x-1/4)^2 . 2 = 8`
`(x-1/4)^2 = 4`
`->` \(\left[{}\begin{matrix}x-\dfrac{1}{4}=2\\x-\dfrac{1}{4}=-2\end{matrix}\right.\)
`->` \(\left[{}\begin{matrix}x=\dfrac{9}{4}\\x=-\dfrac{7}{4}\end{matrix}\right.\)
Tính giá trị các biểu thức sau và viết kết quả dưới dạng bình phương của 1 số
A = 2^5 x (-5)^2 - 8^2 - 7
B = 2^3 x (-4)^2 + (-3)^2 x 3^2 - 40
C= (1/4 - 1/2 - 1) ^3 x (2 - 2/5)^3
D = ( -1/4)^2 : (1/2 - 1/3)
E= 4 x (1/4)^2 + 25 x [(3/4)^3 : (5/4)^3] : (3/2)^3
F = 2^3 + 3 x (1/2)^0 - 1+[(-2)^2 : 1/2] - 8
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 x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
Tính
(2/5)^6 : (2/5)^4
(3/16)^2 : (9/8)^2
(2/7 - 1/2)^2
Tìm x , biết
x/1,5 = 4/3
2/9 = x/-72
x: -3/8 = 1/3
|x| = 3,5
|x - 1| = 3,5
Tính
(3/7 + 1/2)^2
(1+2/3 - 1/4)x(4/5 - 3/4)^2
\(b) 5^{x+4} - 3 . 5^{x+3} = 2. 5^{11} \)
\(c) 2 . 3^{x+2} + 4 . 3^{x+1} = 10 . 3 ^{6}\)
\(d) 6 . 8 ^ {x-1} + 8 ^ {x+1} = 6 . 8^ {19} + 8 ^ {21}\)
Bài 1:
a.35 1/6:(-4)/5-46 1/6:(-4)/5
b.1/6+5/6.3/2-3/2+1
c.-1/12-(2 5/8-1/3)
d.-5/4.8/9+-7/16.8/9-2
e.1/6.(-2 3/5)+1 2/5.(-13/5)
Bài 2
a.-5/8+x=(-2/3)^2
b.-1/4-3/4:x=-11/36
c.-22/15x+1/3=/-2/3-1/5/
d./-1/2-x/=1/3
e./2x+3/4/-6=-5
f.-5/7-/1/2-x/=-11/4
g.//x+5/-4/=3
h./17x-5/=/17x+5/
i./x-1/=2x-5
k.(x-1)^3=27
l.(2x-1)^2=25
n.5^x+2=625
m.(2x-1)^3=-8
o.x^2+x=0
1, 1/6 (2x - 3) = -1/2 (x-1/4) - 2/3
2, 17/-8 : 3/4 + 2 . | 3/2x - 1 | = -1/2
3, | x^2 + 1/2 | - 15 1/2 = -12 3/4
Lam giup mik nha (nhanh)
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|
