Question

Dada a funçao f:R→R tal que f(x)=7-x, calcule:
a) f(0) b) f(3) c(-2) d) (1/2)?

Answer 1

Olá!!!

Resolução!!!

f ( x ) = 7 - x

a)

f ( x ) = 7 - x
f ( 0 ) = 7 - ( 0 )
f ( 0 ) = 7

b)

f ( x ) = 7 - x
f ( 3 ) = 7 - ( 3 )
f ( 3 ) = 4

c)

f ( x ) = 7 - x
f ( - 2 ) = 7 - ( - 2 )
f ( - 2 ) = 7 + 2
f ( - 2 ) = 9

d)

f ( x ) = 7 - x
f ( 1/2 ) = 7 - ( 1/2 )
f ( 1/2 ) = 14/2 + 1/2
f ( 1/2 ) = ( 14 + 1 )/2
f ( 1/2 ) = 15/2

Espero ter ajudado!!!