दिया गया है कि  है और  है। यदि  है, तो (a+2b) का मान क्या है?

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CBSE Superintendent Official Paper (Held On: 20 Apr, 2025)
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  1. 24
  2. 30
  3. 36
  4. 40

Answer (Detailed Solution Below)

Option 3 : 36
Free
ST 1: Current Affairs and General Awareness
20 Qs. 60 Marks 20 Mins

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दिया गया है:

प्रयुक्त सूत्र:

गणना:

सबसे पहले, x के व्यंजक को सरल कीजिए:

अब, y के व्यंजक को सरल कीजिए:

यह (a + b)(a - b) = a2 - b2 के रूप में है

⇒ y = 1

अब, का मान ज्ञात कीजिए:

हमें दिया गया है कि .

इसलिए,

तर्कसंगत और अतर्कसंगत भागों की तुलना करने पर:

a = 0

b = 18

a + 2b = 0 + 2 × 18

⇒ a + 2b = 0 + 36

⇒ a + 2b = 36

इसलिए, सही उत्तर विकल्प 3 है।

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