a)\([x.\dfrac{1}{2}]^{3}=\dfrac{1}{27}\)

b)\([x+\dfrac{1}{2} ]^{2}=\dfrac{4}{5} \)

c) I 3x-4/5 I = 11/5

d) I 2x - 2I = 0

Thực hiện phép tính 

a)\(\dfrac{5^{16}.27^{7}}{125^{5}.9^{11}}\)

b)\((-0,2)^{2}.5-\dfrac{2^{13}.27^{3}}{4^{6}.9^{5}}\)

c)\(\dfrac{5^{6}+2^{2}.25^{3}+2^{3}.125^{2}}{26.5^{6}}\)