jee_main_2025_28_jan_evening - Sequences and Series Topics

Master these core formulas and structures to solve almost any past paper question.

Sample Questions in this Chapter

QUESTION #63 Telescopic Series Summation
For positive integers n, if 4aₙ=(n²+5n+6) and Sₙ=Σk=1ⁿ( 1ak) then the value of 507 S₂₀₂₅ is:
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QUESTION #73 Arithmetic Progression Applications
The interior angles of a polygon with n sides, are in an A.P. with common difference 6° If the largest interior angle of the polygon is 219°, then n is equal to
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Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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Topic-wise Practice Hub

Practice past-year questions one chapter at a time. Pick an exam → subject → chapter and get every PYQ for that topic — pulled together from all past papers — with the chapter's key formulas alongside.

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