Question

Com Cálculos
Dadas as funções f( -2 ) , f( 0 ) , f ( 1 ) e f ( 1/2 ).

b ) y = -4x+1
c) f ( x ) = -x+3
d) f ( x ) = 1/2x+1

Answer 1

f( -2 ) , f( 0 ) , f ( 1 ) e f ( 1/2 ).


b ) y = -4x+1

f( -2 ) = - 4(-2) + 1 ==> 8 + 1 ==> 9
f( 0 ) = - 4(0) + 1 ==> 0 + 1 ==> 1
f ( 1 ) = - 4(1) + 1 ==> -4 + 1 ==> - 3
f ( 1/2 ) = - 4(1/2) + 1 ==> - 2 + 1 ==> - 1
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c) f ( x ) = -x+3

f( -2 ) = -(-2)+3 ==> 2 + 3 ==> 5
f( 0 ) = -(0)+3 ==> 0 + 3 ==> 3
f ( 1 ) = - 1+3 ==> 2 
f ( 1/2 ) = -(1/2)+3 ==> (-1 + 6)/2 ==> 5/2
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d) f ( x ) = 1/2x+1

f( -2 ) =  1/2(-2) + 1==> - 1 + 1 ==> 0
f( 0 ) = 1/2(0) + 1==> 0 + 1 ==> 1
f ( 1 ) = 1/2(1) + 1==> ( 1 + 2 )/2 ==> 3/2
f ( 1/2 ) = 1/2(-2) + 1==> - 1 + 1 ==> 0