(2x - 1)x-4 = (x + 2)x-4
=> 2x - 1 = x +2
=> 2x - 1 -x = 2
=> 2x - x -1 = 2
=> x - 1 = 2
x = 2+1
x = 3
(2x - 1)x-4 = (x + 2)x-4
=> 2x - 1 = x +2
=> 2x - 1 -x = 2
=> 2x - x -1 = 2
=> x - 1 = 2
x = 2+1
x = 3
bài 19: tìm
a) \(x^n\)= 1 ( n \(\inℕ^∗\) )
b) \(x^n\)= 0 ( n \(\inℕ^∗\) )
c)\(x^2\) = 9
d) \(3^x\) = 9
e) \(x^4\) = 1
f) \(5^x\) = 25
g) \(5^x\) = 125
h) \(2^x\) = 4
i) \(2^x\) = 8
j) \(2^x\) = 16
k) \(2^x\) = \(2^x\)
l) \(2^x\) = 1
m) \(3^x\) = 81
n)\(3^x\) = 27
o) \(9^x\) = \(3^4\)
help me, giúp tớ vs, nhanh nha, chi tiết đi r tớ tick cho
BT1 : Tìm x và y biết
a, \(|x-2\cdot y|+|y-1|=0\)
b, \(|x-3|+|x-2\cdot y-5|=0\)
BT2 : Tìm n \(\inℕ\)
\(\frac{n^2-4\cdot n-3}{n-2}\)\(\inℕ^{ }\)
Tìm x
\(\left(2x+1\right)⋮\left(3x+1\right)\)\(\left(x\inℕ\right)\left(x\inℤ\right)\)
\(\left(5x-2\right)⋮\left(3x+1\right)\)\(\left(x\inℕ\right)\left(x\inℤ\right)\)
\(\left(x^2+x+3\right)⋮\left(x+1\right)\)\(\left(x\inℕ\right)\)
tìm x thuộc N để x+2=4 có giá trị la1 số nguyên x+2=4/x-3
2x+1/x+2
tìm x để:
(x+3).(4-x)=(1-x).(x-7)
(2x-1).(x-1)=(x+2).(2x+3)
(4-x).(3-x)=(1-x).(10-x)
(x+1).(x+4)=(x+2).(x+3)
(1-3x).(x+4)=(x+2).(-3x+2)
Tìm x, y \(\inℕ\) biết:
(x2+1)(x2+2)(x2+3)(x2+4) + 7.5y = 17167
Tìm x, biết:
\(\frac{1}{2.4}+\frac{1}{4.6}+...+\frac{1}{\left(2x-2\right).2x}=\frac{1}{8}\)(\(x\inℕ,\)\(x\ge2\))
Tìm n để ps sau có giá trị nguyên
2n+1 / n+1
Tìm x
-5.(x + 1/5 ) +1/3 = 2x - 5/6
9/4 . x^3 + 16/3 = 20/3
( 1/2 x - 1 )^2 + 1 = 13/4
2 : | x - 1 | - 12/16 = 25%
Tìm x biết
a) \(\frac{2}{7}< \frac{x}{3}< \frac{11}{4};x\inℕ\)
b)\(\left(4,5m-\frac{3}{4}.5\frac{1}{3}\right).\frac{1}{12}+\frac{1}{2}x=1\frac{1}{2}\)
ai nhanh cho 2 tick