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If (a=12) and (d=0), what are the first three terms?

Answer and explanation

Correct answer: (12,12,12)

An arithmetic progression changes by the same common difference from one term to the next. If the first term is \\(a=12\\) and the common difference is \\(d=0\\), no change occurs at any step. Thus the second term is \\(12+0\\), and the third is also the preceding term plus zero. A zero difference means a constant sequence, not an alternating or increasing sequence.

Using the first-term rule, \\(a_1=12\\), \\(a_2=a_1+d=12+0=12\\), and \\(a_3=a_2+d=12+0=12\\). Therefore, the first three terms are \\(12,12,12\\), which is option C. Options A, B, and D incorrectly introduce a change between terms even though the common difference is zero.

Related tags

SequencesProgressionsArithmetic-ProgressionClass-9Easy

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