Question

Resolva as equações considerando U = R

Answer 1

1) $10.(0,2)^x=2.(0,2)^3\\(0,2)^x= \frac{2(0,2)^3}{10}\\(0,2)^x=0,2.0,2^3\\0,2^x=0,2^4\\\\x=4$

2) $5. (\frac{2}{5})^x=2.( \frac{2}{5})^{2-x}\\\\( \frac{2}{5})^x= \frac{2}{5}.( \frac{2}{5})^{2-x}\\\\( \frac{2}{5})^x=( \frac{2}{5})^{3-x}\\\\x=3-x\\2x=3\\x= \frac{3}{2}$