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What is the common difference of the sequence (0.75, 1.2, 1.65, 2.10,\ldots)?

Answer and explanation

Correct answer: 0.45

The common difference is found by subtracting a term from the next term: \(1.20-0.75=0.45\). Checking further, \(1.65-1.20=0.45\) and \(2.10-1.65=0.45\). Hence, this is an AP with common difference 0.45. Choosing 0.40 does not give the actual difference between consecutive terms. Exam tip: Align decimal points before subtracting decimal numbers.

Related tags

Arithmetic ProgressionCommon DifferenceDecimal NumbersSequenceClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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