Question:

In which interval the function \(f(x) = \frac {x}{(x^2-6x-16)}\) is increasing?

Updated On: Sep 8, 2024
  • φ

  • \([1,\frac 34)∪(\frac 54, ∞)\)

  • \((\frac 54 ,∞)\)

  • \((\frac 34, \frac 54)\)

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The Correct Option is A

Solution and Explanation

The correct option is (A): φ
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Concepts Used:

Increasing and Decreasing Functions

Increasing Function:

On an interval I, a function f(x) is said to be increasing, if for any two numbers x and y in I such that x < y, 

⇒ f(x) ≤ f(y)

Decreasing Function:

On an interval I, a function f(x) is said to be decreasing, if for any two numbers x and y in I such that x < y,

⇒ f(x) ≥ f(y)

Strictly Increasing Function:

On an interval I, a function f(x) is said to be strictly increasing, if for any two numbers x and y in I such that x < y,

⇒ f(x) < f(y)

Strictly Decreasing Function:

On an interval I, a function f(x) is said to be strictly decreasing, if for any two numbers x and y in I such that x < y,

⇒ f(x) > f(y)

Graphical Representation of Increasing and Decreasing Functions