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If (A={1,2,3}), how many functions from (A) to (A) are not one-one?यदि (A={1,2,3}), तो (A) से (A) में ऐसे फलनों की संख्या कितनी है जो एकैकी नहीं हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (21)(21)
Step 1: Total functions are (3^3=27). Step 2: One-one functions are (3!=6). Step 3: Not one-one functions are (27-6=21).चरण 1: कुल फलन (3^3=27) हैं। चरण 2: एकैकी फलन (3!=6) हैं। चरण 3: एकैकी नहीं फलन (27-6=21) होंगे।
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