Arithmetic sequences and seriesEdexcel International A Level Maths: Mind map

Exam questions on Arithmetic sequences and series

1. The first term of an arithmetic sequence is $7$ and the common difference is $4$.
   Find the smallest value of $n$ for which the $n$th term is greater than $200$.2 marks
2. A sequence has $r$th term $u_r=3r+1$.
   Find the value of $\displaystyle\sum_{r=11}^{20}u_r$.2 marks
3. An arithmetic series has third term $11$ and eighth term $36$. The sum of the first $n$ terms is $S_n$.
   Find the first term and the common difference.3 marks