If 2²ⁿ⁻¹ = 1/8ⁿ⁻³, then the value of n isयदि 2²ⁿ⁻¹ = 1/8ⁿ⁻³, तो n का मान है
यदि 2²ⁿ⁻¹ = 1/8ⁿ⁻³, तो n का मान है
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Correct answer: (B) 22
Explanation
2²ⁿ⁻¹ = 1/8ⁿ⁻³ = 2⁻³⁽ⁿ⁻³⁾, so 2n − 1 = −3n + 9, giving n = 2.2²ⁿ⁻¹ = 1/8ⁿ⁻³ = 2⁻³⁽ⁿ⁻³⁾, अतः 2n − 1 = −3n + 9, जिससे n = 2।