1 - Reescreva as potências a se a) 4^(1)/(2)= b) 256^(1)/(4)= c) 81^(1)/(4)= d) ((81)/(256))^(1)/(4)=

a) $$4^{\frac {1}{2}} = \sqrt{4} = 2$$

b) $$256^{\frac {1}{4}} = \sqrt[4]{256} = 4$$

c) $$81^{\frac {1}{4}} = \sqrt[4]{81} = 3$$

d) $$(\frac {81}{256})^{\frac {1}{4}} = \sqrt[4]{\frac {81}{256}} = \frac {3}{4}$$