Question

1.Fie functia f:R-->R , F(x)=-x+2. Calculati F(3)
2.Fie functia f:R-->R=-2x+1. Calculati E= f(-1) - f(2)

Answer 1

1. f(x)=-x+2
f(3)=-3+2
f(3)=-1
2. f(x)=-2x+1
f(-1)=-2*(-1)+1
f(-1)=2+1=3
f(2)=-2*2+1
f(2)=-4+1
f(2)=-3
E=3-(-3)=3+3=6

Answer 2

1. f(3)=-3+2=-1
2. f(-1)=-2+1=-1
    f(2)=-4+1=-3
E=f(-1) - f(2)
  =-1 -3= -4