\(A\left(x-1\right)^{x+2}=\left(x-1\right)^{x+4}\\\Leftrightarrow \left(x-1\right)^{x+4}-\left(x-1\right)^{x+2}=0\\ \Leftrightarrow\left(x-1\right)^{x+2}\left(\left(x-1\right)^{x+2}+1\right)=0\\ \Leftrightarrow\left(x-1\right)^{x+2}=0hoac\left(x-1\right)^{x+2}+1=0\)
Giả tiếp đc x=1
tìm x biết
\(\frac{1}{4}.\frac{2}{6}.\frac{3}{8}.\frac{4}{10}.\frac{5}{12}....\frac{30}{62}.\frac{31}{64}=4^x\)
tìm x biết
\(\frac{1}{4}+\frac{2}{6}+\frac{3}{8}+\frac{4}{10}+\frac{5}{12}+...+\frac{30}{62}+\frac{31}{64}=2^x\)
Tìm x, biết:
\(\frac{1}{4}\cdot\frac{2}{6}\cdot\frac{3}{8}\cdot\frac{4}{10}\cdot\frac{5}{12}\cdot.....\cdot\frac{30}{62}\cdot\frac{31}{64}=2^x\)
1/4×2/6×3/8×4/10×5/12×.....×30/62×1/64=2^x
Tìm x
\(\dfrac{1}{4}\cdot\dfrac{2}{6}\cdot\dfrac{3}{8}\cdot\dfrac{4}{10}\cdot\dfrac{5}{12}..........\cdot\dfrac{30}{62}\cdot\dfrac{31}{64}=2\)x
Tìm x, biết
\(\dfrac{1}{4}\cdot\dfrac{2}{6}\cdot\dfrac{3}{8}\cdot\dfrac{4}{10}\cdot\dfrac{5}{12}\cdot...\cdot\dfrac{30}{62}\cdot\dfrac{31}{64}\)=\(4^x\)
Tìm x biết rằng:
e) \(5^{x+2_{ }^{ }}\) = \(625\);
f) \(\left(x-1\right)^{x+2}\) = \(\left(x+1\right)^{x+4}\);
g) \(\left(2x-1\right)^3=-8\)
h) \(\frac{1}{4}\).\(\frac{2}{6}.\frac{3}{8}.\frac{4}{10}.\frac{5}{12}...\frac{30}{62}.\frac{31}{64}\) = \(2^x\)
Tìm x,biết:
a) -5(x+\(\dfrac{1}{5}\))-\(\dfrac{1}{2}\left(x-\dfrac{2}{3}\right)=\dfrac{3}{2}x-\dfrac{5}{6}\)
b) \(\dfrac{1}{4}\).\(\dfrac{2}{6}\).\(\dfrac{3}{8}\).\(\dfrac{4}{10}\)...\(\dfrac{30}{62}\).\(\dfrac{31}{64}\)=2x
Tìm x biết:
a) 3./x/=x+12
b)/x/=2.x-1
c) /2.x-1/=x+4
d) /x-3/-x=7
e) /x-3/=x-1
f) /2.x-6/+5.x=9
g) /2.x-8/+4.x=10
h) /2.x-1/+3.x=5
