jee_main_2026_24_january_evening - Sequences and Series Topics

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

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QUESTION #5 Arithmetic Progression Properties
Let alpha_1, alpha_2, alpha_3, alpha_4 be an A.P. of four terms such that each term of the A.P. and its common difference l are integers. If alpha_1 + alpha_2 + alpha_3 + alpha_4 = 48 and alpha_1alpha_2alpha_3alpha_4 + l^4 = 361 then the largest term of the A.P. is equal to
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QUESTION #7 Sum of Infinite Series
left(frac13 + frac47right) + left(frac13^2 + frac13 times frac47 + frac4^27^2right) + left(frac13^3 + frac13^2 times frac47 + frac13 times frac4^27^2 + frac4^37^3right) + dots upto infinite terms is equal to -
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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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