a)10
b)25
c)40
d)55
Resposta
Resposta letra B.
[tex3]a=\frac{25^{-\frac{1}{2}}\cdot 25^{\frac{3}{2}}}{2\cdot 10}\rightarrow \frac{5^{-1}\cdot 5^{3}}{5^{-1}}\rightarrow 5^{3}= 125[/tex3]
[tex3]b=\frac{10}{3}\cdot 6=20[/tex3]
[tex3]\frac{a}{b}=\frac{125}{20}= 6,25[/tex3]