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Observe que apenas x=0 verifica a igualdade, assim a raiz<br />

da equação original é 0.<br />

49) Exercícios<br />

a) x 4 0<br />

b) x 2 0<br />

c) x 1 2 0<br />

d) x 2 x 15<br />

e) 2x<br />

7 4 2 x<br />

f) x 1 x 4 2x 9<br />

g) x 2 x 2 1<br />

2 <br />

h) x 9 x 3<br />

37

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