\(समुच्चय (S_1={x:x\in \mathbb{N},,x\) is a factor of 45 and x+2 is prime}) का सूची रूप क्या है?
\(What is the roster form of (S_1={x:x\in \mathbb{N},,x\) is a factor of 45 and x+2 is prime})?
Explanation opens after your attempt
C. \(S_1={1,3}\)
Concept
Factors of (45) are (1,3,5,9,15,45).
Why this answer is correct
Adding (2) gives (3,5,7,11,17,47), all of which are prime.
Exam Tip
Therefore all listed factors satisfy the condition, so the full set of factors is needed. चरण 1: (45) के भाजक (1,3,5,9,15,45) हैं। चरण 2: (x+2) जांचें: (3,5,7,11,17,47) मिलते हैं, और ये सभी अभाज्य हैं। चरण 3: इसलिए सभी भाजक लेने चाहिए, न कि केवल छोटे मान।
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