13 Consider the function fx 1xx 1 Find the subintervals of

13)

Consider the function

f(x) = 1/(x(x + 1))
Find the subintervals of monotonicity of f within the interval [-2,4].

First, calculate the derivative of f(x):
f \'(x) =

Solution

factorising f(x)= 1/x - 1/(x+1) monotonically decreasing interval is [1,4] first derivative of f(x) is f`(x) = -x^-2 + (x+1)^-2
13) Consider the function f(x) = 1/(x(x + 1)) Find the subintervals of monotonicity of f within the interval [-2,4]. First, calculate the derivative of f(x): f

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