यदि  है, तो का मान क्या है?

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SSC CGL 2023 Tier-I Official Paper (Held On: 14 Jul 2023 Shift 1)
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Answer (Detailed Solution Below)

Option 3 :
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SSC CGL Tier 1 2025 Full Test - 01
100 Qs. 200 Marks 60 Mins

Detailed Solution

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प्रयुक्त सूत्र

(a - b)2 = a2 + b- 2ab

गणना

व्यंजक को 4/7 से गुणा करने पर 

⇒  4/7 × (7b - 1/4b) = 7 × 4/7

⇒  4b - 1/7b = 4

दोनों पक्षों का वर्ग करने पर:

⇒ (4b - 1/7b)2 = 42

⇒ - 2 × 4 × 1/7 = 16

⇒  = 16 + 8/7

⇒  = 120/7

मान 120/7 है।

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