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What is the (6)th term of (27,64,125,216,\ldots)?

Answer and explanation

Correct answer: 512

The terms are \(3^3, 4^3, 5^3, 6^3, \ldots\). Hence, the \(n\)th term is \((n+2)^3\). Therefore, the (6)th term is \((6+2)^3=8^3=512\). Here, \(343=7^3\) is the fifth term, so it is a close but incorrect option. Exam tip: Rewrite the terms as cubes and identify the pattern in their bases.

Related tags

SequencesCube NumbersNth TermNumber PatternsClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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