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11. Comparați: a)
[tex]3 {}^{29 } - 2 \times 3 {}^{28} [/tex]
cu
[tex]2 {}^{43} - 2 {}^{42} [/tex]
b)
[tex](2 {}^{5} ) {}^{10} \times 4 {}^{25} [/tex]
cu
[tex] {6}^{40} [/tex]
c)
[tex]2 \times 2 {}^{2} \times {2}^{3} \times ... \times 2 {}^{10} [/tex]
cu
[tex] ({6}^{5}) {}^{2} - {}^{3} [/tex]