Question

(20^-4*15^-3)/30^-7 var og

Answer 1

 [tex]Cred\;ca\; exercitiul\; , \;arata \;astfel:\\ (20^{-4}\cdot15^{-3})/30^{-7}=?[/tex]
[tex]adica \;\;\frac{1}{20^4}*\frac{1}{15^3}:\frac{1}{30^7}\;\rightarrow\;\frac{1}{20^4}=\frac{1}{20^3*20}\;\,deci:\;\\ \frac{1}{(20*15)^3*20}:\frac{1}{30^7}=\frac{1}{30^3*10^3\cdot20}\cdot\frac{30^7}{1}=\frac{3^4\cdot10^4}{2\cdot10^4}=\frac{3^4}{2}=81:2=40,5[/tex]