Math Formula Encyclopedia
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134 formulas10 subjectsExamples + variables
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4 matching formulas
Algebra
Discriminant
Δ = b² − 4ac
Determines the nature of quadratic roots.
Open formula →Number Theory & SequencesArithmetic Sequence Term
aₙ = a₁ + (n−1)d
Nth term of an arithmetic sequence.
Open formula →Number Theory & SequencesGeometric Sequence Term
aₙ = a₁r^(n−1)
Nth term of a geometric sequence.
Open formula →Number Theory & SequencesFinite Geometric Series
Sₙ = a₁(1−r^n)/(1−r)
Sum of first n terms of a geometric series.
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