CAT Practice : Functions

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What is fogoh ?

Function of a function

    Q.13: The value of fogoh(9) could be, if
    f(x) =
    g(x) =
    h(x) = √x

    1. 3
    2. -5
    3. None of these

 

  • Correct Answer
    Choice D. None of these

Detailed Solution

fogoh(9) means f(g(h(9)))
Start by solving h(9) = √9 = 3 and not (3, -3) as square root of a number is always positive.
Taking the value to be 3, g(3) = = 1 =) f(1) = 1
Therefore, Answer – (D)

Correct Answer: None of these



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