Respostas

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2013-11-17T19:37:07-02:00
A) -(2)- ( 2^{2} )- ( 2^{3} )- ( 2^{4} )
-2-4-8-16= -30

b) (4+1/2)(4+1/2)
9/2 x 9/2= 81/4
1 5 1