Sequence and series

Sequence and series (Questions)

Notes:
The nth term in an arithmetic progression is: an = a + (n-1)d
sum of the nth terms in an arithmetic progression is Sn = n/2(2a + (n-1)d)

A. Solve the following arithmetic progression questions.

1. If the 10th term is 21 while the 12nd term is 25, what is the common difference (d) and also the second terms of the series.
2. Find the 10th term of the series (Given that the sum of the nth terms in an arithmetic progression is Sn = 3n + n²).

About Dr Loo – O-level & JC H2 math tutor

I am Dr Loo, a PhD holder with 8 years of teaching experience on secondary school and tertiary level. In addition, I also received teaching training under tertiary setting. Furthermore, I have publisehd 5 research papers on international peer reviewed journals. I do provide JC Math Tuition (H1 Math Tuition & H2 Math Tuition).

Thus, for those who are looking for a JC Math Tutor (H1 Math tutor or H2 Math tutor) as well as O-level Math Tutor, you may contact me for my math tuition in Singapore. I can be contacted through SMS/Whatsapp/Telegram at +65-85483705.