\(\frac{5.2^{18}.3^{18}.2^{12}-2.2^{28}.3^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}=\frac{5.2^{30}.3^{18}-2^{29}.3^{18}}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}=\frac{2^{29}.3^{18}\left(5.2-1\right)}{2^{28}.3^{18}\left(5-7.2\right)}\)
\(\frac{2^{29}.3^{18}.9}{2^{28}.3^{18}.-9}=\frac{2.9}{-9}=-2\)
\(\text{Tìm }x,\text{ }\text{biết:}\)
\(1\text{)}\text{ }2.\left(x-\frac{1}{3}\right)-3\left(x-\frac{1}{2}\right)=\frac{1}{2}x\)
\(2\text{) }-3\left(x-\frac{1}{4}\right)-\frac{1}{3}\left(x+\frac{1}{2}\right)=x\)
\(\text{3) }\frac{3}{2}\left(x-\frac{5}{3}\right)-\frac{4}{5}=x+1\)
\(\text{4) }\frac{1}{6}\left(2.x-3\right)=\frac{1}{2}\left(-x+\frac{1}{4}-\frac{2}{3}\right)\)
\(\text{5) }-\frac{2}{3}\left(x-\frac{1}{4}\right)=\frac{1}{3}\left(2.x-1\right)\)
Tìm x , biết :
\(a,\text{ }2^x\cdot4=128\)
\(b,\text{ }x^{15}=x\)
\(c,\text{ }\left(2x+1\right)^3=125\)
\(d,\text{ }\left(x-5\right)^4=\left(x-5\right)^6\)
\(e,\text{ }\left(2x-15\right)^5=\left(2x-15\right)^3\)
\(\text{Tìm x, biết:}\)
\(a\)) \(20\text{%}x-x+\dfrac{1}{5}=\dfrac{3}{4}\)
\(b\)) \(\dfrac{2x+1}{3}=\dfrac{x-5}{2}\)
\(c\)) \(\left(x-\dfrac{3}{4}\right)\left(4+3x\right)=0\)
\(d\)) \(x-\dfrac{1}{3}x+\dfrac{1}{5}x=\dfrac{-26}{5}\)
\(e\)) \(50\text{%}x+\dfrac{2}{3}x=x-5\)
\(g\)) \(\dfrac{2}{3}\left(x+\dfrac{9}{5}\right)-\dfrac{3}{10}.\left(5x-\dfrac{1}{3}\right)=\dfrac{7}{15}\)
bai 1 \(\frac{-3}{\text{2}}+\frac{5}{7}+\frac{-31}{14}< hoac=\text{x}< \frac{1}{\text{2}}+\frac{1}{3}+\frac{1}{6}\)\(\frac{1}{6}\)
bai 2 \(\frac{\text{x}+4}{\text{x}-\text{2}}+\frac{\text{2}\text{x}-5}{\text{x}-\text{2}}\)la so nguyen
A=\(\frac{1\text{x}2+2\text{x}4+3\text{x}6+...+n\text{x}2n}{3\text{x}4+6\text{x}8+9\text{x}12+...+x}\)
Tìm GTNN của biểu thức sau :
\(\alpha,\) \(A=5x^2-1\)
b, \(\text{B}=3\left(x+1\right)^2-2\)
c, \(C=|x+5|-3\)
d, \(\text{D}=\left|x+1\right|+\text{|y-2|}=2017\)
Tính A biết:
\(A=\frac{1\text{x}2+2\text{x}4+3\text{x}6+...+n\text{x}2n}{3\text{x}4+6\text{x}8+9\text{x}12+...+x}\)
I,1,Tìm giá trị nhỏ nhất
D=|x-2|+|x-9|+|x+1945|
II,Tìm x,y,z
1,|x-2|-|2x+3|-x=2 2,|x-2|-|2x-3|-x=2
3,|x-7|+2x+5=6 4,\(\left(3x-5\right)^{2006}+\left(y^2-1\right)^{2008}+\left(x-2\right)^{2100}=0\)
5,||x+3|-11|=2 6,2009-|x-2009|=x
7,\(\left(2x-2\right)^{2008}+\left(y-\frac{2}{5}\right)^{2008}+\text{|}x+y-Z\text{|}=0\)
III,Tìm x,y,z \(\varepsilon\)Z
1,\(4^2-3\text{|}y-3\text{|}=4\left(2012-x\right)^4\)
2,\(25-y^2+8\left(x-2009\right)^2\)
\(1.\text{Tìm x:}\)
\(-7\left(3x-5\right)+2\left(7x-14\right)=28\)
\(\text{2.Tính}\)
\(A=6^2+6^4+6^6+....+6^{2010}\)
\(\text{P/s: Đăng_hộ_e_gái}\)
\(\text{https://olm.vn/thanhvien/camvancamly}\)
