Sequences & Series Solver

About Sequences & Series

An arithmetic progression (AP) adds the same number every time; a geometric progression (GP) multiplies by the same number every time. That single distinction unlocks most of the Class 10–11 chapter. The 13 solved examples cover the nth term and the sum of n terms for both AP and GP, the formulas for the sum of the first n natural numbers, their squares, and their cubes, and a few problems where the trick is to spot a hidden AP inside a word problem ("a man saves ₹100 in the first month and ₹50 more each month after").

What this calculator does

• Step-by-step working. Every intermediate line is shown, in the layout examiners reward in CBSE / ICSE and university scripts.
• Graphs where they help. Functions and equations are plotted so you can see the result rather than just read it.
• Verification. The answer is substituted back into the original problem so you know the working is consistent.

Frequently Asked Questions