Question

Write the first three terms of the sequence whose general term is
$a_n{n}^2-n+1$

• A. $1,3,7$
• B. $2,4,5$
• C. $1,4,6$
• D. $1,3,5$

Answer 1

Answer: (A)

$a_n=n^2-n+1$
Substituting $n=1,2,3$, we get
$a_1={\left(1\right)}^2-1+1=1$,
$a_2=3,$
$a_3=7$
So, the required terms are $1,3,7$.