Các câu hỏi tương tự
tìm x biết : \(5^{2x-3}-2.5^2=75\)
\(\left(3.\left|x.\left(-24\right).7^{2019}\right|\right)=2.7^{2020}.\frac{1}{2020}\)
17 tháng 3 2019 lúc 22:58
Tìm x, biết:
a) \(x-\left\{\left[-x-\left(x+3\right)\right]-\left[\left(x+2018\right)-\left(x+2019\right)\right]+21\right\}=2020\)
b) \(\frac{1}{x}-\left\{\frac{1}{2.4}+\frac{1}{4.6}+\frac{1}{6.8}+...+\frac{1}{2018.2020}\right\}=\frac{1}{2019}\)
Help me! ( tặng 2 - 3 tk )
tìm x biết \(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{x.\left(x+1\right)}=\frac{2019}{2020}\)
Cho b=\(1-\frac{2017}{2019}+\left(\frac{2017}{2019}\right)^2-\left(\frac{2017}{2019}\right)^3+...+\left(\frac{2017}{2019}\right)^{2020}\)
Cmr b<0
\(2020^{2020}\times\left(7^{10}\times7^8-3\times2^4-2^{2020}\div2^{2020}\right)\)
Tìm x:
\(\frac{1}{2}\times x-\frac{3}{5}=\frac{-4}{5}\) B)\(\left(x-\frac{2}{3}\right)\div\frac{-3}{7}=\frac{-9}{14}\)
Tim x biet
\(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x\left(x+1\right)}=\frac{2019}{2020}\)
\(e.\left(x+\frac{2019}{2020}\right)^{100}+\left(y-\frac{9}{11}\right)^{200}=0\)
Ai làm nhanh mik tim cho
\(\left|x-3y\right|^{2019}+\left|y+4\right|^{2020}=0\)
1. Tìm x
\(\frac{2}{2.3}+\frac{2}{3.4}+...+\frac{2}{x\left(x+1\right)}=\frac{2019}{2020}\)