Question

dada a função f : R → definida por f (x)= x2 - 2 calcule: a)f(-1) b)f(1) c)f(-2) e)f(0) g)f(-4)

Answer 1

f(x)= x²-2

a) f(-1)= (-1)²-2= +1-2=-1

b) f(1)= 1²-2= 1-2= -1

c) f(-2)= (-2)²-2=+4-2=+2

e) f(0)= 0²-2=0-2=-2

g) f(-4)= (-4)²-2= +4-2= +2