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Arithmetic Progression

an=1+(n1)(2)a_n = 1 + (n-1)(2)

Discrete Sequence Generator

Explore discrete functions

Current Formula

an=a1+(n1)da_n = a_1 + (n-1)d

Inspect Point

Hover over a point to inspect its value.

Long-Term Behavior

Diverges to infinity
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Sequences & Series Patterns

Discover the discrete nature of sequences. See how arithmetic progressions form lines, geometric ones grow exponentially, and alternating series exhibit distinct oscillatory behavior across the coordinate plane.

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Key Concepts

Arithmetic Sequence

A sequence where each term increases or decreases by a constant difference, forming a linear pattern of discrete points.

Geometric Sequence

A sequence where each term is multiplied by a constant ratio, forming an exponential curve.

Alternating Sequence

A sequence whose terms alternate between positive and negative values, often caused by a negative common ratio.

Discrete Functions & Envelopes

A sequence is essentially a function whose domain is restricted to positive integers (1, 2, 3...). As a result, sequences manifest graphically not as a smooth continuous curve, but rather as an ordered set of discrete points.

An arithmetic sequence acts exactly like a linear function (y = mx + c), while a geometric sequence follows an exponential function curve (y = a*r^x).

By visualizing these sequences on a grid, you can immediately see their long-term behavior: whether they diverge to infinity, decay to zero, or oscillate across the horizontal axis.

Frequently Asked Questions