Lesson eLearning

Let f(x)=2x+3 and g(x)=x^2-1. Compute .

easy 1 mark Class 12 · Mathematics · Relations and Functions
Answer
120

The correct answer is 120 — Substitute into g: g(11) = 11^2 - 1 = 121 - 1 = 120.

Step-by-step solution

  1. Evaluate f(4) = 2*4+3 = 11.
  2. Substitute into g: g(11) = 11^2 - 1 = 121 - 1 = 120.
Common mistake: Forgetting to evaluate f before g

Concept tested: Composition of functions

Published · How this solution was prepared and checked

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