Find following limit for 7-2x lim/h-> f(4+h)-f(4)/h

Answer 1

f(4 + h) = 7 - 2(4 + h)

f(4 + h) = 7 - 8 - 4h

f(4 + h) = -1 - 4h

f(4) = 7 - 2(4)

f(4) = 7 - 8

f(4) = -1

Now substitute into formula and simplify.