\(2^x-2^4\times2^7\times32=0\\ \Rightarrow2^x-2^4\times2^7\times2^5=0\\ \Rightarrow2^x-2^{16}=0\\ \Rightarrow2^x=2^{16}\\ \Rightarrow x=16\)
\(2^x-2^4\times2^7\times32=0\\ \Rightarrow2^x-2^4\times2^7\times2^5=0\\ \Rightarrow2^x-2^{16}=0\\ \Rightarrow2^x=2^{16}\\ \Rightarrow x=16\)
Tìm số nguyên x, biết
a) x – 2 = -6
b)15 – (x – 7) = -21
c)4.(3x – 4) – 2 = 18
d) (3x – 6) + 3 = 32
e) (3x – 6) . 3 = 32
f) (3x – 6) : 3 = 32
g) (3x – 6) - 3 = 32
h) (3x -2 mũ4 ).7mũ3 = 2.7mũ4
i) |x| = |-7| k) |x+1| = 2
l)|x – 2| = 3
m) x +|-2| = 0
o) 72 – 3.|x + 1| = 9
p) |x+1| = 3 và x+1< 0
q) (x – 2).(x + 4) = 0
1) –45 + 5.(–2x) = 95
2) x.(12 + x).(71 – x) = 0
3) (x – 11).(x + 12).(–x – 13) = 0
4) |2.x – 15| = 7
5) –2.|x + 32| = –112
Tìm x thuộc N, biết :
[(46-32)^2-(54-42)^2].2.x-1872=0
(x-7)^7=(c-7)^8
1+2^3+3^3-4^2.x=20
Bài 3 : Tìm x Z biết.
a) x(x + 2) = 0 e) 7x – 13 = 3 2 .4
b) 5 – 2x = -7 f) 155 – 5(x + 3) = 80
c) (x + 3)(x – 4) = 0 g) 119 + 3 3 .x = 2 3 . 5 2
d) – 32 – 4(x – 5) = 0 h) 3(2x + 1) – 19 = 14
Viết các biểu thức sau dưới dạng một lũy thừa:
6, 3/2 x 9/4 x 81/16
7, (1/2)^7 x 8 x 32 x 2^8
8, (-1/7)^4 x 125 x 5
9, 4 x 32 : (2^3 x 1/16)
10, (1/7)^2 x 1/7 x 49
a,|x|-7/6=9/15
b,|x-4/3|=1/6
c,|x-4/3|-1/3=1/2
d,8/3-|7/9-x|=-1/5
e,|x-1/4^2|-25/64=0
f,(x-1/4)^2+17/64=21/32
9.x + 1=73
2.x - 5 = -17 - 12
10 - x - 5 = - 5 - 7 -11
(-9) . x + 3 = (-2) . (-7) +16
(-12) . x - 34 =2
(-11).x + 9 =130
(-5) .x + 5 = (-15) .(-4) -12
IxI -3=0
(7 - IxI).(2.x - 4) =0
280-(x-140):35 =270
(1900 - 2.x ) : 35- 32 =16
720 :[41-(2x -5 )] =23 .5
(x - 5).(x2 - 4 ) =0
GIÚP MIK VS ,MIK CẦN GẤP
2. tìm x thuộc Z:
e. (x-5)5=32
f. (2-x)4=81
g. (31-2x)3=-27
h. (x-2).(7-x)>0
i. |x+7| lớn hơn hoặc = 3
Tìm x, biết:
a, 390 – (x – 7) = 169:13
b, (x – 140) : 7 = 3 3 - 2 3 . 3
c, x – 6 : 2 – (48 – 24) : 2 :6 – 3 = 0
d, x + 5.2 – (32+16.3:6 – 15) = 0