Răspuns :
[tex]\it \left(\dfrac{1}{4}\right)^{15}:\left(\dfrac{1}{2}\right)^{30}= \left(\dfrac{1}{4}\right)^{15}:\left[\left(\dfrac{1}{2}\right)^2\right]^{15}= \left(\dfrac{1}{4}\right)^{15}:\left(\dfrac{1}{4}\right)^{15}=1[/tex]
[tex]\it \left(\dfrac{1}{4}\right)^{15}:\left(\dfrac{1}{2}\right)^{30}= \left(\dfrac{1}{4}\right)^{15}:\left[\left(\dfrac{1}{2}\right)^2\right]^{15}= \left(\dfrac{1}{4}\right)^{15}:\left(\dfrac{1}{4}\right)^{15}=1[/tex]