\(\left(\dfrac{2}{3}-\dfrac{1}{4}\right)^{x-2}=1\)
\(\dfrac{5}{12}^{x-2}=1\)
\(\dfrac{5}{12}^{x-2}=\dfrac{5}{12}^0\)
\(x-2=0\)
\(x=0+2\)
\(x=2\)
\(\left(\dfrac{2}{3}-\dfrac{1}{4}\right)^{x-2}=1\)
\(\left(\dfrac{8}{12}-\dfrac{3}{12}\right)^{x-2}=1\)
\(\left(\dfrac{5}{12}\right)^{x-2}=1\)
\(\left(\dfrac{5}{12}\right)^{x-2}=\left(\dfrac{5}{12}\right)^0\)
`=> x-2=0`
`x=0+2`
`x=2`
Vậy `x=2`
\(\left(\dfrac{2}{3}-\dfrac{1}{4}\right)^{x-2}=1\)
\(\left(\dfrac{8}{12}-\dfrac{3}{12}\right)^{x-2}=1\)
\(\left(\dfrac{5}{12}\right)^{x-2}=1\)
`=>`\(\left(\dfrac{5}{12}\right)^{x-2}=\left(\dfrac{5}{12}\right)^0\)
`=>x-2=0`
`x=0+2`
`x=2`
