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If (n!=120), what is the value of ((n-2)!)?यदि (n!=120) हो, तो ((n-2)!) का मान क्या है?
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Correct answer:सही उत्तर: 66
Since 120 = 5!, we get n = 5. Therefore, (n-2)! = (5-2)! = 3! = 3 × 2 × 1 = 6. The value 24 is 4!, which would arise if (n-1)! were asked. Exam tip: First identify n from the given factorial, then substitute it into the required factorial expression.क्योंकि 120 = 5!, इसलिए n = 5 होगा। अतः (n-2)! = (5-2)! = 3! = 3 × 2 × 1 = 6। विकल्प 24, 4! का मान है; यह तब मिलता जब n-1! पूछा जाता। परीक्षा टिप: पहले दिए गए फैक्टोरियल से n ज्ञात करें, फिर मांगी गई फैक्टोरियल अभिव्यक्ति में उसका मान रखें।
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