Sequences and Graphs

Calculate an arithmetic sequence from the first term and common difference, or from the first two terms. See the nth term, the sum of the first terms, and the generated sequence.

Calculate a geometric sequence from the first term and common ratio, or from the first two terms. See the nth term, first n-term sum, and infinite sum when it converges.

Find the nth term of an arithmetic sequence from the first term, common difference, and term number. The calculator also shows the substitution and a short sequence check.

Calculate the sum of the first n terms of an arithmetic series from the first term and common difference, or from the first and last terms.

Plot formula. Add up to 5 functions, use common math functions, and compare curves on one graph.

Enter two known points and a target x to estimate y on the line between them. The calculator flags extrapolation when x is outside the interval.

Solve exponential decay problems for remaining amount, initial amount, elapsed time, half-life, and decay constant. Includes a decay curve and same-unit time inputs.