Răspuns:
[tex]=\Big(\frac{641}{90} \Big)^{6} \\[/tex]
Explicație pas cu pas:
[tex]7\frac{11}{90} =\frac{7 \cdot 90 + 11}{90} =\frac{641}{90} \\[/tex]
[tex]\Big[\Big(7\frac{11}{90} \Big)^{3} \Big]^{2} =\Big[\Big(\frac{641}{90} \Big)^{3} \Big]^{2} =\Big(\frac{641}{90} \Big)^{3 \: \cdot \: 2} =\boxed{\Big(\frac{641}{90 }\Big)^{6}} \\[/tex]
[tex]\it \Big[\Big(7\dfrac{11}{90}\Big)^3\Big]^2=\Big(\dfrac{641}{90}\Big)^6=\dfrac{641^6}{90^6}[/tex]
