Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSArithmetic Progressions2 Marks
Question
If the nth term an of sequence is given by $\text{a}_\text{n}=\text{n}^2-\text{n}+1,$ write down its first five terms.
✓
Answer
$\text{a}_\text{n}=\text{n}^2-\text{n}+1$ is the given sequence then, first 5 tems are $\text{a}_1,\ \text{a}_2,\ \text{a}_3,\ \text{a}_4$ and $\text{a}_5$ $\text{a}_1=(1)^2-1+1=1$ $\text{a}_2=(2)^2-2+1=3$ $\text{a}_2=(3)^2-3+1=7$ $\text{a}^4=(4)^2-4+1=13$ $\text{a}_5=(5)^2-5+1=21$ First 5 terms 1, 3, 7, 13 and 21.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.