Question

(2/5)^x+1x4=32/125 giúp mình với

Answer 1

\(\left(\frac{2}{5}\right)^{\text{x}+1}\cdot4=\frac{32}{125}\)

\(\Rightarrow\left(\frac{2}{5}\right)^{\text{x}+1}=\frac{32}{125}\div4\)

\(\Rightarrow\left(\frac{2}{5}\right)^{\text{x}+1}=\frac{8}{125}\)

\(\Rightarrow\left(\frac{2}{5}\right)^{\text{x}+1}=\left(\frac{2}{5}\right)^3\)

\(\Rightarrow x+1=3\Rightarrow x=3-1=2\)

Vậy x = 2