Question

Sendo f(x)= 2x -2, calcule o valor de:
a) f(1)
b) f( -2)
c) f(0)
d) f( -1)+ f(2)

Answer 1

Vamos lá !

Calculando as funções ...

f ( X ) = 2X - 2
_______________

A ) f ( 1 ) = 2 ( 1 ) - 2

f ( 1 ) = 2 - 2

f ( 1 ) = 0

B ) f ( - 2 ) = 2 ( - 2 ) - 2

f ( - 2 ) = - 4 - 2

f ( - 2 ) = - 6

C ) f ( 0 ) = 2 ( 0 ) - 2

f ( 0 ) = 0 - 2

f ( 0 ) = - 2

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f ( - 1 ) = 2 ( - 1 ) - 2

f ( - 1 ) = - 2 - 2

f ( - 1 ) = - 4

f ( 2 ) = 2 ( 2 ) - 2

f ( 2 ) = 4 - 2

f ( 2 ) = 2

D ) Chamaremos "V" de valor desconhecido...

V = f ( - 1 ) + f ( 2 )

V = - 4 + 2

V = - 2