2x-1 = 16
2x-1 = 24
=> x - 1 = 4
x = 4 + 1
x = 5
Vậy x = 5
\(2^{x-1}=16\)
\(\Rightarrow2^{x-1}=2^4\)
\(\Rightarrow x-1=4\)
\(\Rightarrow x=5\)
Vậy \(x=5\)
2x-1 = 16
2x-1 = 24
=> x - 1 = 4
x = 4 + 1
x = 5
Vậy x = 5
\(2^{x-1}=16\)
\(\Rightarrow2^{x-1}=2^4\)
\(\Rightarrow x-1=4\)
\(\Rightarrow x=5\)
Vậy \(x=5\)
Tìm x biết
2x/15+2x/35+2x/63+....+2x/195=4/5
Chứng minh rằng 1/2-1/4+1/8-1/16+1/32-1/1/64<1/3
Tìm x , biết
a ) 16x : 4x = 16
b) ( 2x + 1 )3 = -64
c ) ( 3x - 1 )2 = 16
d ) 9x+1 = 32
Tìm số tự nhiên x biết :
a)(x2-1).(2x-6)=0
b)2x+3x-x-24=16
c)(x2+1).(x-5).(x-1)=0
Tìm số tự nhiên x biết :
a)(x2-1).(2x-6)=0
b)2x+3x-x-24=16
c)(x2+1).(x-5).(x-1)=0
tìm x , biết
a) 5/6 - x = -7 / 12 + 2/3
b) ( 2,4x - 36 ) : 1va5/7 = -1
c) 2 ( x - 1 ) - 3 ( 2x + 2 ) - 4 ( 2x + 3 ) = 16
d ) ( x - 2 ) . ( x + 3 ) > 0
Tìm x,y
a) x.y = 11
b) ( 2x + 1 ) ( 3y - 2 ) = 12
c) 1 + 2 + 3 + ... + x = 55
d) 6 chia hết ( x - 1 )
e) ( 2x + 1 ) 3 = 27
f) 2x . 16 = 128
Tìm x:
a. (1/x - 2/3)2 - 1/16 = 0
b. 1 + 3 + 5 + ... + (2x - 1) = 225 (x\(\in\) N*)
x5+2x =91
4^x-3 =256
2^3x:2^x=16
(x-2)3 =125
5chia hết cho x - 1 , (x >1)
bài 1:tìm x
\(^{x^2}\)-0.25=0
\(\dfrac{8}{2x}\)=2
(2x-1)\(^{^{ }3}\)=8
(x-2)\(^{^{ }2}\)=16
2x - 16 = 40 - x