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Matemática

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EXERCÍCIOS DE SALA:<br />

33<br />

2<br />

1. (UFPE/2007) Simplificando 31 2<br />

3<br />

10<br />

a) 2 7<br />

b) 2 8<br />

c) 2 9<br />

d) 2 10<br />

e) 2 11<br />

obtemos:<br />

2. (Cpcar- 2012) Considere os números reais<br />

x 2,7<br />

1<br />

<br />

3<br />

<br />

y <br />

<br />

0,25 16<br />

4 <br />

<br />

z <br />

<br />

2<br />

3 3 5 2 1<br />

<br />

2 3<br />

2<br />

<br />

2 2 5<br />

<br />

2<br />

7<br />

1<br />

<br />

<br />

<br />

<br />

2<br />

<br />

É FALSO afirmar que:<br />

a) z <br />

3<br />

y 2<br />

1<br />

b) xy<br />

<br />

5<br />

c) xz<br />

0<br />

3. (CFTMG/2012) Simplificando a expressão<br />

a) 12 x<br />

b) 6 5<br />

x .<br />

c) 12 x 5 .<br />

d) 6 x.<br />

x<br />

3<br />

2<br />

3 4<br />

x<br />

,<br />

na qual <br />

<br />

obtém-se<br />

33

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