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Silvania012
@Silvania012
January 2020
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Dada as funções f ( x ) =9x – 11 eg ( x ) = 3x²- 8 x-5,assinale com( v ) verdadeiro ou ( f ) falso as afirmações que se seguem:
( ) f ( -3 ) + g ( -4 ) = 21
( ) g ( 7) – f ( -1 )=106
( )f ( 0)+ g ( 0)= - 16
( ) f ( 1/2 )- g ( -3 )= -54
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superaks
Verified answer
Olá Silvania,
f(-3) + g(-4) = 9.(-3) - 11 + (3.(-4)² - 8.(-4) - 5
-27 - 11 + 3.16 + 32 - 5
-11 + 48
37
(f)
f (-3)+ g(-4) = 21
-----------------------------
g(7) - f(-1) = 3.(7)² - 8.7 - 5 + (9.(-1) - 11)
3.49 - 56 - 5 - 9 - 11
147 - 72
75
(f)
g(7) - f(-1) = 106
-----------------------------
f(0) + g(0) = 9.0 - 11 + (3.0² - 8.0 - 5)
-11 - 5
-16
(v)
f(0) + g(0) = -16
-----------------------------
f(1/2) - g(-3) = 9.(1/2) - 11 + (3.(1/2)² - 8.(1/2) - 5)
4,5 - 11 + 3.(1/4) - 4 - 5
-15,5 + 0,75
-14,75
(f)
f(1/2) - g(-3) = -54
-----------------------------
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Lista de comentários
Verified answer
Olá Silvania,f(-3) + g(-4) = 9.(-3) - 11 + (3.(-4)² - 8.(-4) - 5
-27 - 11 + 3.16 + 32 - 5
-11 + 48
37
(f) f (-3)+ g(-4) = 21
-----------------------------
g(7) - f(-1) = 3.(7)² - 8.7 - 5 + (9.(-1) - 11)
3.49 - 56 - 5 - 9 - 11
147 - 72
75
(f) g(7) - f(-1) = 106
-----------------------------
f(0) + g(0) = 9.0 - 11 + (3.0² - 8.0 - 5)
-11 - 5
-16
(v) f(0) + g(0) = -16
-----------------------------
f(1/2) - g(-3) = 9.(1/2) - 11 + (3.(1/2)² - 8.(1/2) - 5)
4,5 - 11 + 3.(1/4) - 4 - 5
-15,5 + 0,75
-14,75
(f) f(1/2) - g(-3) = -54
-----------------------------
Dúvidas? comente