Question:

A function \( f(x) = -1 \) for all values of \( x \). Another function \( g(x) = 3x \) for all values of \( x \). What is \( g(f(x)) \) when \( x = 4 \)?

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In composition of functions, always solve inner function first, then apply the outer.
Updated On: Sep 30, 2025
  • \(-3\)
  • \(3\)
  • \(12\)
  • \(-12\)
  • \(-1\)
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The Correct Option is A

Solution and Explanation

Step 1: \( f(x) = -1 \) always, regardless of \( x \). So \( f(4) = -1 \).

Step 2: Now compute \( g(f(x)) = g(-1) \).

Step 3: Since \( g(x) = 3x \), we get \( g(-1) = -3 \).
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