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What is the sum of the first (4) terms of the arithmetic progression (12,20,28,36,\ldots)?

Answer and explanation

Correct answer: 96

The first four terms are 12, 20, 28, and 36. Therefore, their sum is \(12+20+28+36=96\). Option 92 is the sum of only the first three terms, \(12+20+28\), so it is incorrect. Exam tip: When an arithmetic progression has only a few terms, adding them directly is often quickest.

Related tags

Arithmetic ProgressionSequenceSum Of TermsClass 9 MathematicsNumber PatternsSequences And ProgressionsMathematicsClass 9 Mcq

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