given the piecewise function evaluate f(3)-f(1)

Question

f(x)={2x^2 -1 if x<1

x+4 if x> 1

Answer 1

As 3 and 1 both satisfy x ≥ 1, the second function must be used.

f(3) = 3 +4 = 7

f(1) = 1 + 4 = 5

f(3) - f(1) = 2