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Arithmetic Progressions — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSArithmetic Progressions2 Marks
Question
Find: $n^{th}$ term of the A.P. 13, 8, 3, -2, ...
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Answer

Find $n^{th}$ A.P. 13, 8, 3, -2, ... Here, $\text{a}_1=13$ $\text{d}=-5$ $\therefore\text{a}_\text{n}=\text{a}+(\text{n}-1)\text{d}$ $=13+(\text{n}-1)(-5)$ $=-5\text{n}+18$

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