APGP Question #1

This is a question from A-level 1999 Paper 1. A very simple question that tests you if you know your stuffs. 🙂

The $r^{th}$ term of a series is $3^{r-1} + 2r$ . Find the sum of the first $n$ terms.

Ans: $\frac{1}{2} (3^{n}-1)+n(n+1)$

About

KS has been teaching H2/H1 Mathematics and IB mathematics for the more than 10 years. Having taught students from all various Junior Colleges, KS adapts to students' abilities and help them better understand the topics. As someone who loves to teach mathematics and sees it as a truly useful tool in life, KS seeks to enable students to appreciate math. Therefore, his tuition mission is to motivate and cultivate students to be independent and confident thinkers.

Leave a Comment Cancel reply

Leave a Comment
Cancel reply