Question

Dada a função f (x) = 5x + 4 calcule
3. f (3) + 2 . f (-1)

Answer 1

$f(3)=5*(3)+4 = \\ f(3)=15+4 \\ f(3)=19 \\ \\ f(-1) = 5*(-1)+4 = \\ f(-1)=-5+4 \\ f(-1)=-1 \\ \\ 3*f(3) + 2*f(-1) = \\ 3*(19)+2*(-1)= \\ 57 -2=55$