\(\left(2x-1\right)^7=\left(2x-1^5\right)\\ \left(2x-1\right)^7-\left(2x-1\right)^5=0\\ \left(2x-1\right)^2=0\\ \Rightarrow2x-1=0\\ 2x=1\\ x=\dfrac{1}{2}\)
Vậy:...
Tìm x biết
\(\left(2x-1\right)^7=\left(2x-1\right)^5\)
Giúp mk vs ! Mk cần gấp lắm! Càng nhanh càng tốt nha ! Mìn sẽ tick ko kể đúng hay sai !
Cần giúp nhanh vs
Bài 1. Tìm x
a) \(\left|x+\dfrac{7}{4}\right|=\dfrac{1}{2}\)
b) \(\left|2x+1\right|-\dfrac{2}{5}=\dfrac{1}{3}\)
c) \(3x.\left(x+\dfrac{2}{3}\right)=0\)
d) \(x+\dfrac{1}{3}=\dfrac{2}{5}-\left(-\dfrac{1}{3}\right)\)
Bài 2. Tính nhanh
\(A=\dfrac{1}{100}-\dfrac{1}{100.99}-\dfrac{1}{99.98}-\dfrac{1}{98.97}-....-\dfrac{1}{3.2}-\dfrac{1}{2.1}\)
Bài 25: Tìm x, biết
a) \(\left|x\right|+\left|x+2\right|=0\)
b) \(\left|x\left(x^2-\dfrac{5}{4}\right)\right|=x\)
Giúp mk vs, ai nhanh mk sẽ tick
1,Tìm x, biết:
a/\(^{\left(x-1\right)^{x+2}}=^{\left(x-1\right)^{x+4}}\)
b/\(\dfrac{1}{4}\cdot\dfrac{2}{6}\cdot\dfrac{3}{8}\cdot\dfrac{4}{10}\cdot...\cdot\dfrac{30}{62}\cdot\dfrac{31}{64}=2x\)
c/\(4^x+3^x=2^x+6^x\left(STN\right)\)
GIÚP MÌNH NHANH NHA MÌNH TICK CHO
Tìm x biết
a) \(\left|2-x\right|+\dfrac{3}{4}=6,75\)
b) \(\left|1+2x\right|-2x=1\)
c) \(\left|3x-1\right|=1-3x\)
d) \(\left|3x-1\right|=\left|5-2x\right|\)
GIÚP MK LÀM BÀI NÀY VỚI NHA ,MK ĐANG CẦN GẤP LẮM
|x+1|+|x+2|=5
mk sẽ tick cho
Tìm x biết :
a) \(\left|2x+3\right|\) + x = 4
b) \(\left|5x-3\right|=\left|x-7\right|\)
c) \(2.\left|x-1\right|-3x=7\)
d) \(\left|\dfrac{3}{5}-\dfrac{1}{2}x\right|>\dfrac{2}{5}\)
tìm x biết
1)\(\left(1-2x\right)^2=9\)
2)\(\left(x+5\right)^3=-64\)
3)\(\left(3x-5\right)^2=16\)
4) \(\left(x-1\right)^3=27\)
5)\(x^2+x=0\)
6)\(5^{x+2}=625\)
7) \(5-\left|3x-1\right|=3\)
8) \(\left|2x-1\right|+5=4\)
9)\(\left|\dfrac{1}{3}-x\right|-1=\dfrac{2}{3}\)
Tìm x biết
a)\(\left(3x+\dfrac{1}{3}\right)\left(x-\dfrac{1}{2}\right)=0\)
b)\(\left(x-\dfrac{3}{2}\right)\left(2x+1\right)>0\)
c)\(\left(2-x\right)\left(\dfrac{4}{5}-x\right)< 0\)
d)\(\left(x-\dfrac{4}{7}\right):\left(x+\dfrac{1}{2}\right)>0\)
e)\(2\left(x+1\right)-\dfrac{1}{3}.\left(x-1\right)=\dfrac{2}{3}\)
k)\(\left|4x-0,2\right|=0,2\)