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If (2^{x-2}=16), find (x).

Answer and explanation

Correct answer: 6

Since 16 = 2^4, the equation becomes 2^{x-2} = 2^4. Powers with the same base are equal only when their exponents are equal, so x - 2 = 4 and x = 6. Therefore, option C is correct. Exam tip: Rewrite the number on the right as a power with the same base before comparing exponents.

Related tags

ExponentsNumber SystemsExponential EquationsPowersClass 9MathematicsClass 9 Mcq

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