Question

dada a função f(x)=2x+1, determine: A) f(1) B) f(-3) C)x,se f(x)=2 D)x,se f(x)=-4

Answer 1

$\: f(1) = 2x + 1 \\ f(1) = 2 + 1 = 3 \\ \\ f( - 3) = 2. - 3 + 1 \\ f( - 3) = - 6 + 1 = - 5$