Let {S}, {T}, {U} be three non-void sets and {f}: {S} \to {T}, {g}: {T} \to {U} and composed mapping {g} . {f}: {S} \to {U} be defined. Let {g} . {f} be injective mapping. Then

Correct Answer is : f is obviously injective.

WBJEE 2022 Math Solved Paper

Question : 42 of 75

Marks: +1, -0

Let S,T,U be three non-void sets and f:S→T,g:T→U and composed mapping g.f:S→U be defined. Let g.f be injective mapping. Then

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