Aqui as respostas:
b) 98
c) 9900
Oie, tudo bom?
b)
[tex] = 99 {}^{1} - 1 {}^{99} \\ = 99 - 1 \\ \boxed{ = 98}[/tex]
c)
[tex] = (1 0{}^{4} - 10 {}^{2} ) \div 10 {}^{0} \\ = (10 \: 000 - 100) \div 1 \\ = 9900 \div 1 \\ \boxed{ = 9900}[/tex]
Att. NLE Top Shotta
