a/ \(\Rightarrow\frac{\left(-3\right)^n}{81}=-27\Rightarrow\left(-3\right)^n=-2187\Rightarrow\left(-3\right)^n=\left(-3\right)^7\Rightarrow n=7\)
b/ \(\Rightarrow-\frac{3}{8}-x+\frac{5}{6}=\frac{4}{3}\Rightarrow\frac{11}{24}-x=\frac{4}{3}\Rightarrow x=-\frac{7}{8}\)
tìm X biết
\(5^x.\left(5^3\right)^2=625\)
\(27< 81^3:3^x< 243\)
\(\left(5x+1\right)^2=\frac{36}{49}\)
\(\left(x-\frac{2}{9}\right)^3=\left(\frac{2}{3}\right)^6\)
giúp mình vs nha
tìm x biết
\(a,2\frac{1}{3}+\left(x-\frac{3}{2}\right)=\left(3-\frac{3}{2}\right).x\)
\(b,\frac{3}{2}:\left(x-1\frac{2}{3}\right)-5\frac{2}{3}=2\frac{5}{3}\)
\(c,\left(\frac{7}{2}-2x\right):3\frac{2}{5}+1\frac{4}{5}=7\frac{6}{5}\)
Tìm x biết
a) \(\left(\frac{3}{5}\right)^5.x=\left(\frac{3}{7}\right)^7\)
b) \(\left(-\frac{1}{3}\right)^3.x=\frac{1}{81}\)
c) \(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)
d) \(\left(x+\frac{1}{4}\right)^4=\frac{16}{81}\)
Ai xong nhanh nhất cho 1 like \(☺\)
1. Tìm x, biết:
a) \(\left(x-\frac{3}{4}\right)^2=0\)
b) \(\left(x+\frac{1}{2}\right)^2=\frac{9}{64}\)
c) \(\frac{\left(-2\right)^x}{16}=-8\)
2. Tính:
\(\frac{6^3.12^4}{4^7.9^5}\)
3. Tìm \(x\in N\), biết:
\(3^2.81\le3^x\le27.243\)
a) Tính \(A=\left(0,25\right)^{-1}.\left(\frac{1}{4}\right)^{-2}.\left(\frac{4}{3}\right)^{-2}.\left(\frac{5}{4}\right)^{-1}.\left(\frac{2}{3}\right)^{-3}\)
b) Tìm só nguyên n,biết :\(^{2^{-1}.2^n+4.2^n=9.2^5}\)
Tìm x biết :
\(9,5-\frac{3}{4}.\left|X-\frac{1}{3}\right|=6\frac{1}{3}-\frac{1}{3}.\left|\frac{1}{3}-X\right|\)
B=1+\(\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+...+\frac{1}{x}\left(1+2+3+...+X\right)\)
Tìm số nguyên dương x để B=115
Giải Nhanh Giups Mình Cần Gấp Lắm
Tìm x, biết:
\(\left(x-\frac{2}{3}\right)^3=\frac{-1}{27}\)
Ai nhanh nhất mik tick 3 cái nè
tim x :
\(a.\left|x+5\right|=\frac{1}{7}-\left|\frac{4}{3}-\frac{1}{6}\right|\)|
\(b.\left|x+\frac{2}{3}\right|=\frac{1}{2}-\left[\frac{1}{4}-\frac{2}{3}\right]\)đau [ ] là dấu ngoặc đơn nha!
\(c.\left|x-\frac{1}{5}\right|=\left|\frac{-5}{2}\right|-\left[\frac{1}{4}-\frac{2}{3}\right]\)đau [ ] là dấu ngoặc đơn nha!
\(d.\left|x-\frac{5}{2}\right|=\frac{4}{3}-\left[\frac{2}{3}-\frac{1}{6}\right]\)đau [ ] là dấu ngoặc đơn nha!
ai nhanh nhất mk tk !
