Các câu hỏi tương tự
Tim x biet
k) \(\left[\left(3,75:\frac{1}{4}+2\frac{2}{5}.125\%\right)-\left(\frac{7}{2}.0,8-1,2:\frac{3}{2}\right)\right]:\left(1\frac{1}{2}+0,75\right)x=64\)
Tim x biet
\(\frac{1}{3.5}+\frac{1}{5.7}+\frac{1}{7.9}+...+\frac{1}{\left(2x+1\right)\left(2x+3\right)}=\frac{15}{93}\)
Tim x biet
\(3\left(x-\frac{1}{2}\right)-5\left(x+\frac{3}{5}\right)=-x+\frac{1}{5}\)
a)\(|2x-2|=x+8\)
b)\(\left(x-1\right)+\left(x-2\right)+\left(x-3\right)+...+\left(x-100\right)=5050\)
tim \(x\in\)N biet
a . \(x^{10}=x\)
b . \(\left(2x-15\right)^5=\left(2x-15\right)^3\)
c . \(\left(7\times n-11\right)=2^5.5^2+200\)
Tim x biet
\(-5\left(x+\frac{1}{5}\right)-\frac{1}{2}\left(x-\frac{2}{3}\right)=\frac{3}{2}x-\frac{5}{6}\)
Tim x biet
1/3×5+1/5×7+.....+1/(2x+1)(2x+3)=100/609
Tim x biet
c) (x - 2)(x + 3)>0
d) \(-1\frac{5}{27}-\left(3x-\frac{7}{9}\right)^3=-\frac{24}{27}\)
Tim STN x, biet:
1+3+5+7+9+... +(2x-1)