Question

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

Answer 1

Răspuns:

$f(x) = - 2x + 1 \\ f( - 1) = - 2 \times ( - 1) + 1 = - 2 + 1 = - 1 \\ f(2) = - 2 \times 2 + 1 = - 4 + 1 = - 3 \\ e = ( - 3. - 1)$