Arithmetic and geometric sequencesIB MYP Maths Extended: Mind map

Exam questions on Arithmetic and geometric sequences

1. An arithmetic sequence has first term $u_1=7$ and common difference $d=4$.
   Find the sum of the first $20$ terms.2 marks
2. A geometric sequence has first term $u_1=3$ and common ratio $r=2$.
   Find the position of the first term in the sequence that is greater than $1000$.2 marks
3. Amira invests AED $2000$ in an account that pays $4\%$ compound interest per year. The interest is added at the end of each year. A calculator may be used.
   Find the value of the investment after $5$ years, to the nearest fils (2 decimal places).3 marks