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Multiple Choice Questions

If 2n 4 ndash 2n 2 3 then n is equal to ........

Quantitative Aptitude (Pb Patwari) Algebra
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    If 2n+4 – 2n+2 = 3, then n is equal to: 

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    Explanation:

    Given expression :
    2n+4 − 2n+2 = 3  ⇔ 2n+2 (22 − 1) = 3  ⇔  2n+2   = 1 = 20
    [Bcz 20  ?is equal to 1]
    From the equation power :                                           
    ⇔ n + 2 = 0 ⇔ n = − 2

    By: Amit Kumar
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