\(100-\left(x+1\right)=90\\ \Rightarrow x+1=10\\ \Rightarrow x=9\)
\(100-\left(x+1\right)=90.\\ x+1=10.\\ x=9.\)
\(100-\left(x+1\right)=90\\ \Rightarrow x+1=10\\ \Rightarrow x=9\)
\(100-\left(x+1\right)=90.\\ x+1=10.\\ x=9.\)
Bài 1 : Tìm x , biết :
a. |x-1|+|x-2|+....+|x-8| = 22
b. |x-1|+|x-2|+|x-3|+...+|x-100| = 2500
Bài 2 :
Tìm x , biết :
|x+1|+|x+2|+....+|x+100| = 605.x
Giúp tớ với ?
Tìm x
a) \(\left(\dfrac{3}{5}x-\dfrac{2}{3}x-x\right)\cdot\dfrac{1}{7}=-\dfrac{5}{21}8\)
b) \(\left(5x-1\right)\cdot\left(2x+\dfrac{1}{3}\right)=0\)
c) \(\dfrac{5\left|x+1\right|}{2}=\dfrac{90}{\left|x+1\right|}\)
1)rút gọn
\(\dfrac{2^3+3\cdot26-4^3}{2^3\cdot3^2}\)
\(\dfrac{4^6\cdot9^5+6^9\cdot120}{8^4\cdot3^{12}-6^{11}}\)
2) tìm x
\(3^{x-1}-3^{x+1}=90\)
2x = 3y = 5z và x - y + z = -90
Tim x
\(\left(2x-1\right)^2=100\)
Cho P(x)= \(100x^{100}+99x^{99}+98x^{98}+...+2x^2+x\)
Tính P(1)
5. Tìm x biết:
a, \(\left|x+1\right|+\left|x+2\right|+\left|x+3\right|+...+\left|x+10\right|=11x+1\)
b, \(\left|x+\frac{1}{101}\right|+\left|x+\frac{2}{101}\right|+...+\left|x+\frac{100}{101}\right|=101x\)
1/ Tìm x
a/ (x-2)(x+2/3)>0
b/ (x-2,5)^20+(y+3,2)^10=0
2/ Chứng minh
A=75(4^2000+4^1999... +4^2+4^1) +25 chia hết cho 100
Tìm giá trị nhỏ nhất
A=|5x+1|-x-10
B=x4 +x3 +2
C=4-x/x-3(x thuộc Z)
D=x2+4x-100