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Arithmetic Progressions

RD Sharma

CBSE

Grade 10

Question:

In an A.P., if $a = 3.5, d = 0, n = 101$, then $a_n$ will be:
(a) $0$
(b) $3.5$
(c) $103.5$
(d) $104.5$

Step-by-Step Solution

Key Concept: When $d = 0$, all terms of the A.P. are equal to the first term $a = 3.5$.

$a_n = a + (n - 1)(0) = a = 3.5$. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Evaluating $a_n = 3.5$: 1.0 Mark

Correct Answer: $3.5$

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