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Let A and B be finite sets with m and n elements respectively, and suppose :A→B is a mapping. If is surjective (onto), show that m ≥ n.
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#5. Rating: Easy
Let A and B be finite sets with m and n elements respectively, and suppose :A→B is a mapping. If is injective (one-to-one), show that m ≤ n.
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#4. Rating: Difficult
x and y are real numbers satisfying
Find the maximum and minimum values of
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Perfect! You got it right.
#3 Rating: Medium
Evaluate:
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