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If (a × b)/c = (a2 + ab - b2)/ (c + a), for all natural numbers of a, b and c, then the value of (4 × 5)/7 is:1. 42. 13. 04. 3 |
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Answer» Correct Answer - Option 2 : 1 Given: (a × b)/c = (a2 + ab - b2)/ (c + a) Calculation: According to question (42 + 4 × 5 - 52)/ (7 + 4) ⇒ (16 + 20 – 25)/11 ⇒ (36 – 25)/11 ⇒ 11/11 ⇒ 1 ∴ (4 × 5)/7 = (42 + 4 × 5 - 52)/ (7 + 4) = 1 The correct option is 2 i.e. 1. |
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