Răspuns:
8. a)
[tex]25 = 5 {}^{2} [/tex]
b)
[tex]36 = 6 {}^{2} [/tex]
c)
[tex]49 = 7 {}^{2} [/tex]
d)
[tex]27 = 3 {}^{3} [/tex]
9. a)
[tex]10 {}^{2} - 10 {}^{0} = 100 - 1 = 99[/tex]
b)
[tex]10 {}^{3} + 10 {}^{0} = 1000 + 1 = 1001[/tex]
c)
[tex]10 {}^{4} - 10 {}^{1} =10000 - 10 = 9990[/tex]
d)
[tex]10 {}^{5} + 10 {}^{1} = 100000 + 10 = 100010[/tex]
10. a)
[tex]2 {}^{4} - 2 {}^{3} = 16 - 8 = 8[/tex]
b)
[tex]3 {}^{4} - 3 {}^{2} = 81 - 9 = 72[/tex]
c)
[tex]2 {}^{6} - 2 {}^{0} = 64 - 1 = 63[/tex]
d)
[tex]5 {}^{3} - 5 {}^{0} = 125 - 1 = 124[/tex]
e)
[tex]4 {}^{3} - 4 {}^{2} = 64 - 16 = 48[/tex]
f)
[tex]5 {}^{3} - 5 {}^{2} = 125 - 25 = 100 = 10 {}^{2} [/tex]
