GATE AE 2022 • Q8 MCQ • 2 Marks General Aptitude

General Aptitude

Quantitative Aptitude

Subtopic: Arithmetic & Numerical Estimation

Question Statement:

Consider the following functions for non-zero positive integers, $p$ and $q$: $$f(p, q) = p \times p \times \cdots \times p \quad (q \text{ terms}) = p^q; \quad f(p, 1) = p$$ $$g(p, q) = p^{p^{p^{\cdot^{\cdot^{\cdot}}}}} \quad (\text{up to } q \text{ terms}); \quad g(p, 1) = p$$ Which one of the following options is correct based on the above?
Question figure for GATE AE 2022 Q8

Scientific schematic diagram reproduced from official IIT paper

Options:

  • (A) $f(2, 2) = g(2, 2)$
  • (B) $f(g(2, 2), 2) < f(2, g(2, 2))$
  • (C) $g(2, 1) \ne f(2, 1)$
  • (D) $f(3, 2) > g(3, 2)$

Official Answer Key:

A

Step-by-Step Solution & Explanation

### **Detailed Step-by-Step Solution (GATE AE 2022 Q.8)** **1. Evaluation for $p = 2, q = 2$**: - $f(2, 2) = 2^2 = 4$ - $g(2, 2) = 2^2 = 4$ Thus $f(2, 2) = g(2, 2) = 4$, which directly verifies Option (A). - **Official Answer Key**: **A**
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