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Arithmetic Progressions — Maths STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceMathsArithmetic Progressions2 Marks
Question
Find: 10th term of the A.P. 1, 4, 7, 10, ...
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Answer

10th term of the A.P.1, 4, 7, 10, ...
Here, 1st term $=\text{a}_1=1$
and common difference d $=4-1=3$
we know $\text{a}_\text{n}=\text{a}_1+(\text{n}-1)\text{d}$
$\therefore\text{a}_{10}=\text{a}_1+(10-1)\text{d}$
$=1+(10-1)3\Rightarrow28$

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