Question

Help please. Need to get this right to get 100%

Answer 1

Explanation:

`f(x) = (4)/(x)\\\\f(a) = (4)/(a)\\\\f(a+h) = (4)/(a+h)\\\\(f(a+h) - f(a))/(h) = ((4)/(a+h) - (4)/(a))/(h)`

`=((4(a))/((a+h)a) - (4(a+h))/(a(a+h)))/(h)\\\\=((4a - 4a - 4h)/(a(a+h)))/(h)\\\\=(( - 4h)/(a(a+h)))/(h)\\\\= (-4h)/(a(a+h) * h)\\\\= -(4)/(a(a+h))\\\\`