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What is the value of ((7^2)^3\div7^5)?

Answer and explanation

Correct answer: 7

Using the power-of-a-power rule, \((7^2)^3=7^{2\times3}=7^6\). When powers with the same base are divided, their exponents are subtracted: \(7^6\div7^5=7^{6-5}=7^1=7\). Therefore, the correct answer is 7. The nearby distractor 49 is the value of \(7^2\), but the remaining exponent here is 1. Exam tip: apply \((a^m)^n=a^{mn}\) first, followed by \(a^m\div a^n=a^{m-n}\).

Related tags

ExponentsExponent LawsNumber SystemsPower Of A PowerDivision Of PowersMathematicsClass 9 Mcq

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