Seja a função f R ➡ R
dada por fx= x²+1
A) f (1 )
B) f ( -1 )
C) f ( 2 )
D) f ( -2)
E) f (1/4)
F) f ( -1/4)
dada por fx= x²+1
A) f (1 )
B) f ( -1 )
C) f ( 2 )
D) f ( -2)
E) f (1/4)
F) f ( -1/4)
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a) x = 1
f(1) = 1² + 1
f(1) = 1 + 1
f(1) = 2
b) x = - 1
f(- 1) = (- 1)² + 1
f(- 1) = 1 + 1
f(- 1) = 2
c) x = 2
f(2) = 2² + 1
f(2) = 4 + 1
f(2) = 5
d) x = - 2
f(- 2) = (- 2)² + 1
f(- 2) = 4 + 1
f(- 2) = 5
e) x = 1/4
f(1/4) = (1/4)² + 1
f(1/4) = 1²/4² + 1
f(1/4) = 1/16 + 1
f(1/4) = (1 + 16)/16
f(1/4) = 17/16
f) x = - 1/4
f(- 1/4) = (- 1/4)² + 1
f(- 1/4) = 1²/4² + 1
f(- 1/4) = 1/16 + 1
f(- 1/4) = 17/16