CA Foundation P3 · Chapter 7 · Question 4 of 9
If f(x) = 2x + 3 and g(x) = x², then (f∘g)(2) is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: D) 11
Explanation
(f∘g)(2) = f(g(2)) = f(4) = 2(4) + 3 = 11. The value 49 is (g∘f)(2) = g(7) = 49, which reverses the order of composition.
More Sets, Relations and Functions, Basics of Limits and Continuity of Functions MCQs
- Q6The value of lim (x→3) (x² − 9)/(x − 3) is:
- Q7The value of lim (x→∞) (4x² + 3x)/(2x² − 7) is:
- Q8The function f(x) = kx + 1 for x ≤ 2 and f(x) = 3x − 1 for x > 2 is continuous at x = 2. The value of k is:
- Q9If A has 3 elements and B has 5 elements, the number of one-one functions from A to B is:
- Q1The number of proper subsets of the set A = {1, 2, 3, 4} is:
