Let R is the set of real numbers such that the function f: R → R and g: R → R are defined by f(x) = x 2 + 3x - 1 and g(x) = 2x + 3 then f°g(x) is:

CA Foundation · Quantitative Aptitude · PYQS · January 2026
Let R is the set of real numbers such that the function f: R → R and g: R → R are defined by f(x) = x 2 + 3x - 1 and g(x) = 2x + 3 then f°g(x) is:
(A) A. 4x 2 + 6x + 1
(B) B. 4x 2 + 18x + 17
(C) C. 4x 2 - 18x + 17
(D) D. 4x 2 - 6x + 1

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. 4x 2 + 18x + 17

Topics: Part-A: Business Mathematics

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