\(\left(x-3\right)^2=1\)
\(\Rightarrow x-3=1\) ( Quy ước \(1^x=1\))
\(=>x=1+3=4\)
Có \(\left(x-3\right)^2=1\)
=> \(\left(x-3\right)^2=1^2\) hoặc \(\left(x-3\right)^2=\left(-1\right)^2\)
=> x-3=1 hoặc x-3=-1
=> x=4 hoặc x=2
Vậy x=4 hoặc x=2
\(\left(x-3\right)^2=1\)
\(\Rightarrow x-3=1\) ( Quy ước \(1^x=1\))
\(=>x=1+3=4\)
Có \(\left(x-3\right)^2=1\)
=> \(\left(x-3\right)^2=1^2\) hoặc \(\left(x-3\right)^2=\left(-1\right)^2\)
=> x-3=1 hoặc x-3=-1
=> x=4 hoặc x=2
Vậy x=4 hoặc x=2
Tìm x biết:
a) \(x:\left(-\dfrac{1}{2}\right)^3=-\dfrac{1}{2}\); b) \(\left(\dfrac{3}{4}\right)^5.x=\left(\dfrac{3}{4}\right)^7\)
Tìm \(x\in\mathbb{Q}\), biết rằng :
a) \(\left(x-\dfrac{1}{2}\right)^2=0\)
b) \(\left(x-2\right)^2=1\)
c) \(\left(2x-1\right)^3=-8\)
d) \(\left(x+\dfrac{1}{2}\right)^2=\dfrac{1}{16}\)
B1: Tìm x,y
a,\(\left|x-2\right|+\left|y-1\right|=0\)
b,\(\left|2-3x\right|+\left|2y+1\right|=0\)
B2: Tìm x, biết
a,\(\left|x-3\right|=3-x\)
b,\(\left|2x+1\right|+x=4\)
c,\(\left|3-x\right|+x-2=3\)
Bài 1: Tìm x, biết
\(a,\frac{2}{3}-\frac{1}{3}.\left(x-\frac{3}{2}\right)-\frac{1}{2}.\left(2x+1\right)=5\)
\(b,\left(x+\frac{1}{2}\right).\left(x-\frac{3}{4}\right)=0\)
\(c,\left(2x-5\right)^4=81\)
\(d,3^{x+1}+3^{x+3}=810\)
tìm x biết
a)\(\left(x-\dfrac{1}{3}\right)\times\left(x+\dfrac{2}{3}\right)\)>0
b)\(\left(x+\dfrac{3}{5}\right)\times\left(x+1\right)\)<0
Tìm x biết :
a) \(x^2-3=1\)
b) \(2x^3+12=-4\)
c) \(\left(2x-3\right)^2=16\)
d) \(x:\left(\dfrac{-1}{2}\right)^1=\dfrac{-1}{2}\)
h) \(\left(\dfrac{1}{4}-x\right)^2=\dfrac{25}{16}\)
i) \(\left(x+\dfrac{1}{3}\right)^3=\dfrac{-1}{8}\)
k) \(\left(\dfrac{1}{2}-x\right)^2=1\)
1. Tìm x biết:
a) \(\left(x+36\right)^2=1936\)
b) \(\dfrac{3}{5}^{x+2}=\dfrac{81}{625}\)
c) \(2005^{\left(2x-1\right)\left(2+3x\right)}=1\)
d) \(\left(\dfrac{9}{16}\right)^{x-5}=\left(\dfrac{4}{3}\right)^4\)
e) \(\left(\dfrac{3}{5}\right)^x.\left(\dfrac{125}{72}\right)^5=\dfrac{81}{625}\)
2. a) Tìm x biết:
\(\left(3x+1\right)^4=\left(3x-1\right)^2\)
b) Có số hữu tỉ x thõa mản đẳng thức
\(\left(3x+1\right)^4+\left(3x-1\right)^2=0\)
3. Tính giá trị của biểu thức:
\(A=\left\{-\left[-\left(\dfrac{1}{x}\right)^2\right]^3\right\}^5.\left\{-\left[-\left(-x\right)^5\right]^2\right\}^3\) ( \(x\notin0\)
4. Tìm các cặp số (x,y) thõa mản các đk sau:
a) \(x\left(x+y\right)=\dfrac{5}{12}\) và \(y\left(x+y\right)=\dfrac{5}{18}\)
b) \(x\left(x-y\right)=\dfrac{2}{45}\) và \(y\left(x-y\right)=\dfrac{1}{25}\)
Mai nộp rồi còn 4 bài đó ( help me )
Tìm số hữu tỉ x biết:
a) \(3\cdot x-1^4=81\)
b) \(\left(x+1\right)^5=-32\)
c) \(\left(5\cdot x-1\right)^6=729\)
d)\(\left(2\cdot x+1\right)^3=0,001\)
e) \(\left(2\cdot x-3\right)^{^{ }4}=\left(2\cdot x-3\right)^6\)
g) \(\left(2\cdot x+1\right)^5=\left(2\cdot x+1\right)^{2020}\)
giúp mk nha mk tick cho chiều đi học rùi
tìm x\(\in\)Q biết rằng
a)\(\left(x-\dfrac{1}{2}\right)^2=0\)
b)\(\left(x-2\right)^2=1\)
c)\(\left(2x-1\right)^3=-8\)
d)\(\left(x+\dfrac{1}{2}\right)^2=\dfrac{1}{16}\)
a) \(x:\left(-\dfrac{1}{2}\right)^3=-\dfrac{1}{2}\)
b)\(\left(\dfrac{3}{4}\right)^2.x=\left(\dfrac{3}{4}\right)^5\)