\(\left(1,2\right)^x:\dfrac{6}{5}=\left(1,2\right)^4\\ =>\left(1,2\right)^x=\left(1,2\right)^4x1,2\\ < =>\left(1,2\right)^x=\left(1,2\right)^5\\ < =>x=5\)
`(1,2)^x : 6/5 = (1,2)^4`
`(6/5)^x : 6/5 = (6/5)^4`
`(6/5)^x = (6/5)^4 xx 6/5`
`(6/5)^x = (6/5)^5`
`=> x = 5`
\(\Leftrightarrow\left(\dfrac{6}{5}\right)^x=\left(\dfrac{6}{5}\right)^4\cdot\left(\dfrac{6}{5}\right)=\left(\dfrac{6}{5}\right)^5\)
hay x=5
`=> (1.2)^x : 1,2 = (1,2)^4`
`=> (1,2)^(x-1) = (1,2)^4`
`=> x - 1 = 4`
`=> x = 5`.
