Salut,
[tex]0,03^4=\left(\dfrac{3}{100}\right)^4=\left(\dfrac{3}{10^2}\right)^4=\dfrac{3^4}{(10^2)^4}=\dfrac{3^4}{10^{2\cdot 4}}=\dfrac{3^4}{10^8}=\dfrac{81}{10^8}=81\cdot 10^{-8}.[/tex]
Ai înțeles ?
Green eyes.
