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If 43a + 2 ÷ 42a = 42a - 3, then find the value of a.1. 52. 43. 24. 3 |
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Answer» Correct Answer - Option 1 : 5 Given: 43a + 2 ÷ 42a = 42a - 3 Concept: Ax ÷ Ay = Ax – y If Bp = Bq, then p = q Calculation: 43a + 2 ÷ 42a = 42a – 3 ⇒ 43a + 2 – 2a = 42a – 3 ⇒ 4a + 2 = 42a - 3 Now, Comparing exponents we'll get a + 2 = 2a – 3 ⇒ a = 3 + 2 ⇒ a = 5 ∴ The value of a is 5. |
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