Beginner
Discrete Mathematics & Math
Q7 / 100
What is the difference between injective (one-to-one) and surjective (onto) functions?
Correct! Well done.
Incorrect.
The correct answer is B) Injective: different inputs give different outputs; Surjective: every codomain element has at least one preimage
B
Correct Answer
Injective: different inputs give different outputs; Surjective: every codomain element has at least one preimage
Explanation
Injective (1-to-1): f(a)=f(b)→a=b (no two inputs share output). Surjective (onto): range = codomain (every y has an x with f(x)=y). Bijective: both — enables invertibility.
Progress
7/100