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Arithmetic Progressions — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSArithmetic Progressions2 Marks
Question
Which trem of the A.P. 3, 8, 13, ...os 248?
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Answer

Let nth term of A.P. = 248
$\therefore​​\text{a}_\text{n}=248=​​\text{a}+(​​\text{n}-1)​​\text{d}$
$\Rightarrow248=3+(​​\text{n}-1)5$
$\therefore​​\text{n}=50$
$\therefore$ 50th term of the given A.P. is 248

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