Question

sendo f(x)=5x, calcule f(x+h)-f(x) e f(x+h)-f(x)/h ou f(x+h)-f(x) sobre h

Answer 1

f(x) = 5

f(x + h) - f(x) = 5(x + h) - 5x = 5x + 5h - 5x = 5h

[f(x + h) - f(x)]/h = [5(x + h) - 5x]/h = [5x + 5h - 5x]/h = 5h/h = 5