Question

1.Fie R,f(x)=-x+2,calculaţi f(3)
2.Fie R,f(x)=-2x+1,calculati E=f(-1)-f(-2)

Answer 1

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

Answer 2

1.f(3)=-3+2=-1
2.f(-1)=-2*(-1)+1=2+1=3
f(-2)=-2(-2) +1=4+1=5
e=3-5=-2