gabmatematica1.html

# gabmatematica1.html - tica Gabarito QUESTO 1 a Reten?o...

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tica Gabarito QUESTÃO 1 a) Reten?o inicial: 3 x 30 = 90 mg/100 mL. Lendo na tabela, 3 horas ap?: 75 mg/100 mL. b) N?ero de doses 1 2 3 4 Reten?o inicial 25 50 75 100 O.K para dirigir ap? 2h sim sim sim n? O n?ero m?imo de doses ?3. QUESTÃO 2 Seja x o n?ero de eleitores. A m?ia, em segundos, ser? ( 0,30.x.70 + 0,70.x.80 ) / x = 77 O tempo m?io gasto por eleitor ?de 77s ou 1 min 17s. QUESTÃO 3 ?ea do semi- c?culo di?etro AC = X ?ea do semi- c?culo di?etro AD = 4X ?ea do semi- c?culo di?etro AE = 9X ?ea do semi- c?culo di?etro AB = 16X S1 = ( 4X - X ) + ( 9X - 4X ) = 8X S2 = X + ( 16X - 9X ) = 8X Sl / S2 = l QUESTÃO 4 a) P.A. dos termos a 22 : 7, 15, 23, ... (r = 8) a 37 = a l + (37 - l) r = 7 + 36 x 8 = 295 b) P.A. dos termos a 22 : an = 7 + ( n - l ).8 = 8n - l P.A. dos termos a ll : a n = ( 8n - l ) - 6 = 8n - 7 Devemos ter: 8n - 7=<661=<8n - l ou 662=<8n=<668; 82,7=<n=<83,5 logo, n = 83. QUESTÃO 5 Temos que: ( I ) ( x 1 + x 2 ) / 2 = 1 ( x 2 + x 3 ) / 2 = 3 ( x 1 + x 3 ) / 2 = 1 ( II ) ( y 1 + x 2 ) / 2 = 2 ( y 2 + y 3 ) / 2 = 4 ( y 1 + y 3 ) / 2 = -1 Resolvendo os sistemas (I) e (II) teremos os tr? v?tices: (x l , y l ) = ( -1, -3), ( x 2 , y 2 ) = ( 3, 7) e ( x 3 , y 3 ) = (3, 1) QUESTÃO 6
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• Summer '09
• Math, Answers , 8n, Eleitor

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