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What is the value of (3^7-3^4)?

Answer and explanation

Correct answer: 2106

Evaluate the powers first: \(3^7=2187\) and \(3^4=81\). Therefore, \(3^7-3^4=2187-81=2106\), so option A is correct. Option C is only the value of \(3^7\); it does not subtract \(3^4\). Exam tip: when subtracting powers with the same base, subtract their values rather than their exponents.

Related tags

ExponentsNumber SystemsPowersArithmetic OperationsMathematicsClass 9 Mcq

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