Question

Urgenteee
Observe e faça o que se pede f(x) =3x-1 calcule

A) f(-2)
B) f (12)
C) f(x) =-2

Answer 1

F (-2) = 3 . (-2) - 1 = -6 - 1 = - 7  F (12) = 3 . 12 - 1 = 36 - 1 =35  

Answer 2

f(x) =3x-1 calcule

a) f(-2)= 3;(-2)-1

f(-2)= -6-1=-7  ( -2,-7)

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b) f(12)= 3.(12)-1= 36-1=35   ( 12,35)

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c) f(x)=-2⇒  3x-1=-2

3x=-2+1

x=-1/3........  ( -1/3, -2)