\(यदि (F_1={x:x\in \mathbb{N},,x\) has exactly two distinct positive factors and \(x<15}), तो (F_1) क्या है\)?
\(If (F_1={x:x\in \mathbb{N},,x\) has exactly two distinct positive factors and \(x<15}), what is (F_1)\)?
Explanation opens after your attempt
B. \(F_1={2,3,5,7,11,13}\)
Concept
Numbers with exactly two positive factors are prime numbers.
Why this answer is correct
Primes less than (15) are (2,3,5,7,11,13).
Exam Tip
(1) is not prime because it does not have two distinct positive factors. चरण 1: ठीक दो धनात्मक भाजक वाली संख्याएं अभाज्य संख्याएं होती हैं। चरण 2: (15) से छोटी अभाज्य संख्याएं (2,3,5,7,11,13) हैं। चरण 3: (1) अभाज्य नहीं है, क्योंकि उसके दो अलग भाजक नहीं होते।
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