Ex 1.3, 13 (MCQ) - Chapter 1 Class 12 Relation and Functions (Important Question)
Last updated at April 16, 2024 by Teachoo
Chapter 1 Class 12 Relation and Functions
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Ex 1.3, 13 (MCQ) Important Deleted for CBSE Board 2025 Exams You are here
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Chapter 1 Class 12 Relation and Functions
Last updated at April 16, 2024 by Teachoo
Ex 1.3, 13 If f: R → R be given by f(x) = 〖"(3 – x3)" 〗^(1/3) , then fof(x) is (A) "x" ^(1/3) (B) x3 (C) x (D) (3 – x3) f(x) = 〖"(3 – x3)" 〗^(1/3) f(f(x)) = 〖"(3 – f(x)3)" 〗^(1/3) fof(x) = ("3 – " 〖"(3 – x3)" 〗^(𝟏/𝟑 × 𝟑) )^(1/3) = ("3 – " 〖"(3 – x3)" 〗^1 )^(1/3) = ("3 – 3 + x3" )^(1/3) = ("x3" )^(1/3) = x Hence fof(x) = x So, C is the correct answer