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Arithmetic Progressions — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSArithmetic Progressions2 Marks
Question
Which term of the A.P. 4, 9, 14, ... is 254?
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Answer

Which term of A.P. is 4, 9, 14, ... is 254?
Let nth term of A.P. be 254
$\text{a}_\text{n}=\text{a}+(\text{n}-1)\text{d}$
$254=\text{n}-1)5$
$\therefore\text{n}=51$
$\therefore$ 51st twrm of the given A. P. is 254.

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