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If the arithmetic progression is (a,a+2,a+4,a+6,\ldots), what is the common difference?

Answer and explanation

Correct answer: (2)

In an arithmetic progression, subtract one term from the next to obtain the constant difference. Using the first two terms, d=(a+2)−a=2. The next checks give (a+4)−(a+2)=2 and (a+6)−(a+4)=2, confirming that the difference is constant. Therefore option C is correct; a and 2a are expressions involving the first term, not the term-to-term increase.

Related tags

Arithmetic-ProgressionCommon-DifferenceAlgebraic-SequenceClass10Introduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)Arithmetic Progressions Ap

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