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What is the value of (2!+4!-1!)?(2!+4!-1!) का मान क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2525
Using factorial values, 2! = 2 and 4! = 4 × 3 × 2 × 1 = 24. Also, 1! = 1. Therefore, 2! + 4! - 1! = 2 + 24 - 1 = 25, so option C is correct. Choosing 24 would ignore the effect of 2! and 1!. Exam tip: evaluate each factorial first, then perform addition or subtraction.क्रमगुणित के अनुसार 2! = 2 तथा 4! = 4 × 3 × 2 × 1 = 24 होता है। साथ ही, 1! = 1 है। अतः 2! + 4! - 1! = 2 + 24 - 1 = 25, इसलिए विकल्प C सही है। 24 लेने पर 2! और 1! का प्रभाव छूट जाएगा। परीक्षा टिप: पहले प्रत्येक क्रमगुणित का मान निकालें, फिर जोड़-घटाव करें।
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