Seja a função f: R⇒R, definida por y = x² - 2x - 3, Calcule:
a) f( -3 )
b) f( -2 )
c) f( -1 )
d) f( 0 )
e) f( 1 )
f) f( 2 )
a) f( -3 )
b) f( -2 )
c) f( -1 )
d) f( 0 )
e) f( 1 )
f) f( 2 )
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a) f(-3) = (-3)² - 2.(-3) - 3
9 +6 -3
f(-3) = 12
b) f(-2) = (-2)² -2.(-2) -3
4 + 4 -3
f(-2) = 5
c) f(-1) = (-1)² -2.(-1) -3
1 + 2 -3
f(-1) = 0
d) f(0) = (0)² -2.(0) -3
f(0) = -3
e) f(1) = (1)² -2.(1) -3
1 -2 -3
f(1) = -4
f) f(2) = (2)² -2.(2) -3
4 -4 -3
f(2) = -3