f(x) = 2/x + 5

f(a) = 2a+5

f(a + h) = 2(a+h)+5

f(a + h) − f(a)/h=2(a+h)+5 -(2a+5 )/h

If the function is f(x) = 2x + 5 instead of f(x) = 2/x + 5, your answer is right.

Otherwise,

f(a) = 2/a+5

f(a + h) = 2/(a+h)+5

f(a + h) − f(a)/h=2/(a+h)+5 -(2/a+5 )/h

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